First Record of the Ocean Sunfish, Mola alexandrini (Ranzani 1839), (Tetraodontiformes: Molidae) from the Coastal Waters of Andhra Pradesh, India
Darwin Chatla and P Padmavathi*
Department of Zoology & Aquaculture, Acharya Nagarjuna University, India
Submission:February 10, 2021; Published:November 15, 2021
*Correspondence author: P Padmavathi, Department of Zoology & Aquaculture, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh, India
How to cite this article: Darwin C, P Padmavathi. First Record of the Ocean Sunfish, Mola alexandrini (Ranzani 1839), (Tetraodontiformes: Molidae) from the Coastal Waters of Andhra Pradesh, India. Oceanogr Fish Open Access J. 2021; 14(3): 555889. DOI: 10.19080/OFOAJ.2021.14.555889
Abstract
Mola alexandrine, commonly known as bump-head sunfish has been reported for the first time from Andhra Pradesh coastal waters. A detailed morphological description of the specimen is provided, and the morphometric and meristic data are compared with those of the same species reported by earlier workers. Historical records of the family Molidae from Indian waters are summarized and discussed.
Keywords: First record; Mola alexandrine; Morphometrics and meristics; Ocean sunfish
Introduction
The ocean sunfishes belonging to the family Molidae are composed of three genera (Ranzania, Masturus and Mola) with five valid species viz., Ranzania laevis (Pennant 1776), Masturus lanceolatus (Lienard 1840), Mola mola (Linnaeus 1758), Mola tecta (Nyegaard et al. 2017) and Mola alexandrini (Ranzani 1839) [1-4]. Family Molidae is monophyletic among highly derived order Tetraodontiformes [5] and characterized by distinctly-shaped body by the lack of true caudal fin, which is replaced by a broad stiff lobe, a pseudo-caudal fin called clavus [6]. These fishes are known to be active swimmers and opportunistic foragers in the pelagic waters of both temperate and tropical oceans [7-9]. The occurrence of ocean sunfishes is rare from Indian coastal waters [10]. However, the presence of some molds has been reported in new areas [11] and previously known distribution ranges are being expanded [12]. These fishes occupy a unique position in marine food web [13,14]. The consumption of these oddly species has not been attracted the folk’s attention due to their rare occurrence and lack of information on their nutritional aspects. However, the meat of the ocean sunfishes is reported to be delicious in Taiwan and Japan [15].
The bump-head sunfish, Mola alexandrini (Ranzani 1839) is a large pelagic species which claimed a record of world’s heaviest teleost fish with a weight of 2,300 kg with 272 cm TL [16]. However, this fish may grow even larger [17]. Sawai et al. [16] found Mola alexandrini (Ranzani 1839) to be synonymous with Mola ramsayi (Giglioli 1883). The present study reports the first record of M. alexandrini from the coastal waters of Andhra Pradesh, India, and an attempt was made to compare the morphological, morphometric, and meristic characters among the known records of the species. The historical records of the family Molidae from the Indian coastal waters are provided and discussed.
Materials and Methods
One specimen of M. alexandrini was collected as by-catch from trawl catches of Kakinada fishing harbor (16° 58′ 30″ N, 82° 16′ 44″ E), East Godavari district, Andhra Pradesh, India (Figure 1). The fish was caught from commercial trawler operated at a depth range of 20-100m on 11th December 2018. The morphological characters were observed in fresh specimen. Morphometric and meristic details were recorded using the standard methods of Fraser-Brunner [6] and Whitley [18]. The species was identified based on the description given by Fraser-Brunner [6]; Sawai et al. [16]; Yosita et al. [17]; Nyegaard et al. [19]. Morphometric measurements were taken as straight-line distances (±1mm) using a 500 cm tape with 1mm gradation.
They included the total length (TL), a linear distance from the tip of the snout to the distal edge of the clavus; pre-clavus band length (PCBL), the straight distance from the tip of snout to the origin of clavus; total body depth (TBD), a linear length between dorsal fin and anal fin tips; body depth (BD), vertical distance between the dorsal and ventral margin of the body where the height is greatest; eye diameter (ED), the distance between the anterior and posterior edges of the orbit; pre-orbital length (POL), the distance between the tip of snout to the origin of eye orbit; pre-dorsal length (PDL), a straight distance from the tip of the snout to the anterior edge of dorsal fin; pre-pectoral length (PPCL), measured from the tip of snout to the anterior end of the pectoral fin; pre-anal length (PAL), a straight distance from the tip of the snout to the anterior end of the anal fin; height of dorsal fin (DFH), the vertical distance from the base to the tip of the dorsal fin; height of anal fin (AFH), the vertical distance from the base to the tip of the anal fin; and length of pectoral fin (PCFL), measured between its origin to the extreme tip. Meristic characteristics included the counts of fin rays in dorsal, pectoral, and anal fins, and clavus ossicles.
Results
Taxonomic position
• Phylum: Chordata
• Class: Actinopterygii
• Order: Tetraodontiformes Berg, 1940
• Family: Molidae Bonaparte, 1835
• Genus: Mola Koelreuter, 1766
• Species: M. alexandrini (Ranzani 1839).
Description
Body orbicular, deep and laterally compressed; skin thick and leathery; scales rectangular; mouth small and terminal; teeth on both jaws fused and beak-like; eyes small; pair of small nostrils in front of eyes; head bump extends from above the eyes to the base of dorsal fin; chin bump from beneath the lower jaw to anal fin base; gill openings small and oval; dorsal and anal fins opposite and triangle shaped; fins with soft rays and spineless; pelvic and caudal fins absent; caudal fin replaced by broad clavus with round margin; smooth band at the base of clavus between dorsal and anal fins; pectoral fin small rounded. Body gray to silvery white dorsally, dusky white ventrally, dorsal and clavus region with reddish brown tinge; fins bluish black, and many irregular paler spots over the body (Figures 2 & 3). The morphometric and meristic characters of the present specimen along with those of earlier works on M. alexandrini are shown in Table 1.
Discussion
The homogeneity in the morphological characters of Mola has created confusion in the species identification. However, the major distinguishing characters for the identification of Mola species are the presence or absence of head bump, chin bump and smooth band back-fold at the base of clavus; shape of the clavus margin; number of fin rays and ossicles in clavus; and the shape of the body scales [6,16,17,19-22]. The diagnostic characters of M. alexandrini observed in the present study such as the presence of head and chin bumps; smooth band at the base of clavus without a back-fold; rounded clavus; 12 clavus ossicles; scales rectangular on middle region of body and paler spots over the body are in conformity with those observed by the earlier workers [6,16,19].
The historical records of the family Molidae for over 65 years (1953-2018) from Indian coastal waters have been presented in Table 2. Based on the historical data, the distribution of the family Molidae in Indian waters is restricted to four species namely M. mola, M. lanceolatus, R. laveis, and M. alexandrini. Of these, M. mola [23] and M. lanceolatus [24] have been reported from coastal waters of Andhra Pradesh. M. alexandrini was reported in Indian waters with the rare occurrence of two records, one from Chennai, Tamil Nadu by Mohan et al. [21] and the other from Kochi, Kerala by Kishor et al. [20]. Hence, it is evident that the current reporting of M. alexandrini is the 3rd record from India and the first ever report from Andhra Pradesh.
In Indian coastal waters, the ocean sunfishes are considered as vagrant species, with only few sporadic sightings. Since 1990’s, however, there has been a considerable increase in the frequency of molids observed in Indian waters [25-30] (Table 2). The occurrence of M. alexandrini in the study area might be due to the fact that the species which are weak may get drifted to the coastal waters by strong currents or in course of chasing specific plankton/diatoms, as they are opportunistic foragers and selective feeders [3,5,13]. Moreover, in recent times there has been a massive development of fisheries and upgraded fishing vessels extended their trawling operations into deeper waters, catching more varieties of fishes in the study region [31-35]. The present report of the species from Andhra Pradesh coastal waters along central east coast of India would help in creating new awareness and scope for the proper documentation of data on this deficient species from the Indian waters [36-47].
N- Number of individuals; TL- Total length; TW- Total weight
Acknowledgment
The author, Darwin Chatla is grateful to the UGC for granting BSR (Basic Scientific Research) fellowship. Authors are thankful to the authorities of Acharya Nagarjuna University for providing necessary facilities. We are thankful to Marianne Nyegaard, School of Veterinary and Life Sciences, Murdoch University, Australia, and Laith A. Jawad, Freelance Fish Biodiversity Consultant and Expert, Auckland, New Zealand, for confirming the species identification and for their valuable advice and suggestions.
References
- Fricke R, Eschmeyer WN, Van der Laan R (2019) Eschmeyer’s Catalogu of Fishes: genera, species, references.
- Froese R, Pauly D (2019) Fishbase.
- Nyegaard M, Loneragan N, Hall S, Andrew J, Sawai E, et al. (2018) Giant jelly eaters on the line: Species distribution and bycatch of three dominant sunfishes in the Southwest Pacific. Estuarine, Coastal and Shelf Science 207: 1-15.
- Sawai E, Yamanoue Y, Jawad L, Al-Mamry J, Sakai Y (2017) Molecular and morphological identification of Mola sunfish specimens (Actinopterygii: Tetraodontiformes: Molidae) from the Indian Ocean. Species Diversity 22(1): 99-104.
- Pope EC, Hays GC, Thys TM, Doyle TK, Sims DW, et al. (2010) The biology and ecology of the ocean sunfish Mola mola: a review of current knowledge and future research perspectives. Reviews in Fish Biology and Fisheries 20(4): 471-487.
- Fraser-Brunner A (1951) The ocean sunfishes (Family Molidae). Bulletin of the British Museum (Natural History) Zoology 1: 89-121.
- Breen P, Canadas A, Cadhla OO, Mackey M, Scheidat M, et al. (2017) New insights into ocean sunfish (Mola mola) abundance and seasonal distribution in the northeast Atlantic. Scientific Reports 7(1): 2025.
- Houghton JD, Doyle TK, Davenport J, Hays GC (2006) The ocean sunfish Mola mola: insights into distribution, abundance and behaviour in the Irish and Celtic Seas. Journal of the Marine Biological Association of the United Kingdom 86(5): 1237-1243.
- Nelson JS, Grande TC, Wilson MV (2016) Fishes of the World. In: (5th) John Wiley & Sons Inc, Hoboken, New Jersey, USA, Pp.1-707.
- Dipanjan R, Anil M, Mrinmay G, Prasad CT, Subhrendu SM (2019) First record of a rare sunfish, Mola mola (Linnaeus, 1758) from coastal waters of West Bengal, India. Rec Zool Surv India 119(1): 81-84.
- Todd VLG, Grove JS (2010) First records of golden trevally (Gnathodon speciosus, Carangidae), sharp-tail mola (Masturus lanceolatus, Molidae) and evidence for white shark (Carcharodon carcharias, Lamnidae) in the Galápagos Islands, Ecuador. Marine Biodiversity Records 3: 1-7.
- Palsson J, Astthorsson OS (2016) New and historical records of the ocean sunfish Mola mola in Icelandic waters. J Fish Biol 90(3): 1126-1132.
- Thys TM, Ryan JP, Dewar H, Perle CR, Lyons K, et al. (2015) Ecology of the ocean sunfish, Mola mola, in the southern California Current System. Journal of Experimental Marine Biology and Ecology 471: 64-76.
- Sousa LL, Xavier R, Costa V, Humphries NE, Trueman C, et al. (2016) DNA barcoding identifies a cosmopolitan diet in the ocean sunfish. Scientific Reports 6: 1-9.
- Thys TM (2006) OceanSunfish.org,
- Sawai E, Yamanoue Y, Nyegaard M, Sakai Y (2018) Redescription of the bump-head sunfish Mola alexandrini (Ranzani 1839), senior synonym of Mola ramsayi (Giglioli 1883), with designation of a neotype for Mola mola (Linnaeus1758) (Tetraodontiformes: Molidae). Ichthyol Res 65(1): 142-160.
- Yoshita Y, Yamanoue Y, Sagara K, Nishibori M, Kuniyoshi H, et al. (2009) Phylogenetic relationship of two Mola sunfishes (Tetraodontiformes: Molidae) occurring around the coast of Japan, with notes on their geographical distribution and morphological characteristics. Ichthyol Res 56(3): 232-234.
- Whitley GP (1931) Studies in Ichthyology. Rec Australian Mus 18(3): 96-134.
- Nyegaard M, Sawai E, Gemmell N, Gillum J, Loneragan NR, et al. (2017) Hiding in broad daylight: molecular and morphological data reveal a new ocean sunfish species (Tetraodontiformes: Molidae) that has eluded recognition. Zoological Journal of Linnean Society 182(3): 631-658.
- Kishor TG, Suraj KS, Dhaneesh KV, Dinesh Kumar S, Seetha PK, et al. (2013) Southern sun fish Mola ramsayi (Giglioli, 1883) recorded from Kochi, southwest coast of India. Mar Fish Infor Serv T & E Ser 218: 9-10.
- Mohan S, Selvanidhi S, Srinivasan G, Poovannan P (2006) Mola ramsayi (Southern sunfish): a new record from Indian waters. Marine Fisheries Information Service, Technical and Extension Series 189: 23-24.
- Ram Bhaskar B, Panduranga Rao D, Rama Murthy M, Maheswarudu G, Durga Prasad YVK, et al. (1988) Rare occurrence of sunfish Mola mola (Linnaeus) from the coastal waters off Visakhapatnam (Bay of Bengal). Journal of The Bombay Natural History Society 85: 629-631.
- Naranji MK, Rao VG, Venu D (2016) An occurrence of the rare Sharptail Mola Masturus lanceolatus (Lienard, 1840) (Tetraodontiformes: Molidae), in the coastal waters of Visakhapatnam, India. J Threat Taxa 8(13): 9592-9594.
- Kulkarni CV (1953) Local and scientific name of commercial fishes of Bombay. J Bombay Nat Hist Soc 51(4): 948-950.
- Chacko PI, Mathew MJ (1956) A record of the Sun fish Ranzania truncata (Retzius). J Bombay Nat Hist Soc 53(4): 724-725.
- Chhapgar BF (1964) Occurrence of the Oblong Sunfish Ranzania truncate (Retzius) in Bombay waters. J Bombay Nat Hist Soc 61(2): 453-456.
- Mohammed ZKM (1975) On the Sunfish, Mola mola (L) a new record from Indian waters. Indian J Fish 22(1&2): 295-296.
- Devaraj M, Nammalwar P, Thiagarajan T (1976) Record of the sunfish Masturus oxyuropterus (bleeker) from the Indian coast. J Mar Biol Associ India 18(3):663-666.
- Ebenezer IP, Jerold Joel J (1984) On a large sunfish Ranzania typus from the South-West coast. Indian J Fish 31(3): 360-361.
- Somvanshi VS, Varghese S, Gupta RK, Naik VV (1996) Sunfishes (Family: Molidae) caught from the Northwestern Indian EEZ. Occasnl 9.
- Arumugam G, Balasubramanian TS, Chellappa M (1994) On the largest sunfish ever caught from Indian seas. Mar Fish Infor Serv T & E Ser 128: 16-17.
- Badrudeen M (1995) On the largest sun fish Masturus lanceolatus Leonard recorded at Periapattinam, Gulf of Mannar. Mar Fish Infor Serv T & E Ser 137: 20.
- Manoj KB, Kizhakudan JK, Sujitha T, Dinesh Babu AP (1998) A record of sun fish Mola mola from coastal waters of Verval. Mar Fish Infor Serv T & E Ser 157: 21-22.
- Victor ACC, Kandasamy D, Ramamoorthy N (1998) On the large sunfish landed near Mandapam. Mar Fish Infor Serv T & E Ser 157: 26-27.
- Kar S, Chakraborty R, Mitra S, Chatterjee TK (2000) First record of the sunfish Ranzania laevis (Pennant) (Pisces: Osteichthyes: Perciformes: Molidae) from the West Bengal Coast. J Bombay Nat Hist Soc 97(2): 288-288.
- Chellappa M, Balasubramanian TS, Arumugam G (2002) On the occurrence of sunfish along Gulf of the Mannar. Mar Fish Infor Serv T & E Ser 174: 10.
- Chellappa M, Balasubramanian TS, Arumugam G (2006) Occurrence of Sunfishes along Tuticorin Coast. Mar Fish Infor Serv T & E Ser 188.
- Sandhya S, Kasinathan C (2006) A note on the landing of slender sun fish near Rameswaram. Mar Fish Infor Serv T & E Ser 187: 18.
- Manoj Kumar PP, Pavithran PP (2007) First record of ocean sunfish, Mola mola from Malabar Coast. Mar Fish Infor Serv T & E Ser 192: 15-16.
- Rammoorthy N, Molly V, Raju A, Kasinathan C, Seeni M (2007) On the sunfish, Masturus lanceolatus landed near Ervadi, Gulf of Mannar. Mar Fish Infor Serv T & E Ser 192:15.
- Ramamurthy N, Vinod K, Gopakumar G (2012) Note on the slender sunfish, Ranzania laevis (Pennant, 1776) landed at Chinnapalam (Pamban), south-east coast of India. Mar Fish Infor Serv T & E Ser 211:10-10.
- Bandana D, Gopalkrishnan A, Saravanakumar A (2012) Rare catch of Masturus lanceolatus (Lienard, 1840) Gill, 1885 from Parangipettai coast, Tamilnadu. Indian Journal of Geomarine Sciences 41(5): 489-490.
- Nair RJ, Paul S, Dinesh Kumar S (2013) Record of a rare Sharp-tail sunfish, Masturus lanceolatus Liénard, 1840 (Tetraodontiformes: Molidae) landing from South-west coast of India. Mar Fish Infor Serv T & E Ser 218: 7-7.
- Purushottama, Anulekshmi GB, Ramkumar C, Thakurdas S, Bala M (2014) A rare occurrence and biology of the Slender sunfish, Ranzania laevis (Actinopterygii: Tetraodontiformes: Molidae), in the coastal waters of Mumbai, North-West Coast of India. Indian J Geomarine Sci 43(8): 1554-1559.
- Das P, Singh P, Bhargava AK, Singh P, Nagpure RS (2014) New locality of sharp-tail sunfish (Masturus lanceolatus) in Indian waters. Marine Biodiversity Records 7.
- Prakash S, Kumar TTA, Thangaraj M (2015) DNA Barcoding of Sharp Tail Sunfish Masturus lanceolatus Lienard, 1840 (Tetraodontiformes: Molidae). Proceedings of Zoological Society 69: 153.
- Babu C, Silambarasan K, Anrose A, Ramalingam L (2019) A new record of a rare species Masturus lanceolatus (Point-tail sunfish) from Chennai coastal waters, India. Indian Journal of Geo-marine Sciences 48(3): 297-301.