This species can be easily identified by its large size, thick lips, two black lines behind its eyes, and the hump on the foreheads of larger adults. Scott & F.H. The specimen was photographed as it cruised past with its companions known as Raft fish, Schedophilus sp. The Southern Sunfish (Mola Alexandrini), known as Ramsay’s sunfish, southern ocean sunfish, short sunfish or bump-head sunfish in various regions of the world, is a fish belonging to the Molidae family. Hutchins, B. The fish of the family Molidae are characterized by their compressed shape, fused teeth, absence of spines in dorsal and anal fins, and a short caudal fin (Yasemi and Narari Bejgan, 2013) and can grow to great sizes. Nyegaard M, Loneragan N, Hall S, Andrew J, Sawai E, Nyegaard M. 2018. Tasmanian Fisheries Development Authority. Last, P.R., E.O.G. Andrew King, a genomics specialist who conducted the DNA extraction and analysis, said the genetic sequence clearly matched samples from an adult Bump-head Sunfish. Hutchins, B. — 2018. The difference in size between the giant sunfish and their teeny-tiny babies could not be more dramatic. (2,000 kilograms). The fish measured 3.1 m from the tip of the dorsal fin to the tip of the anal fin, and 2.5 m from the tip of the snout to the end of the clavus. The giant Bump-head Sunfish, or Mola alexandrini, is a whopper. Pp. Lepomis marginatus (Dollar Sunfish) Comparing to another type of sunfish, I think this type of sunfish has the smallest size. World first identification of a larval Mola alexandrini by Australian and New Zealand Scientists. (eds.) They swim horizontally with rough denticles, skinned textures on their skin, pale browns with brown and gray color until they become white. Sawai E, Yamanoue Y, Nyegaard M, Sakai Y (2018) Redescription of the bump-head sunfish. Adult sunfish are the heaviest bony fish in the world, measuring up to 10 feet (3 meters) long and weighing more than 4,400 lbs. 180. Species Divers, 2, 99–104. Credit: James Alcock. Scientists will now be able to compare this genetically identified larvae with the exceptional collection of Mola larvae sunfish held at the Australian Museum, which has been curated since 1925, along with CSIRO's … You have reached the end of the page. Sunfishes are found worldwide in the open ocean of tropical and temperate seas. Note the ridge above and behind the eye and the fused beak-like teeth. Doi: 10.11369/jji1950.52.35, Sawai, E. et al., 2017. Redescription of the bump-head sunfish. [2], Appeltans, W., Bouchet, P., Boxshall, G.A., Fauchald, K., Gordon, D.P., Hoeksema, B.W., Poore, G.C.B., van Soest, R.W.M., Stöhr, S., Walter, T.C., Costello, M.J. Image number. Ichthyol Res, 56, 232–244. This species of bump-head sunfish is one of three Mola species that occupy Australian waters and is matched in weight only by its congener, the ocean sunfish, also known as the Mola mola. It is closely related to its congener, much wider known Mola mola, and is found in the Southern Hemisphere. The Bump-head Sunfish, Mola alexandrini, was formally known as Mola ramsayi until recent research by Sawai et al (2018) redescribed the species, resolving the long held confusion between this species and the Oceanic sunfish Mola mola. [5] It can be found basking on its side occasionally near the surface, which is thought to be used to re-heat themselves after diving in cold water for prey, recharge their oxygen stores, and attract gulls to free them of parasites. Western Australian Museum. Adult sunfish are the heaviest bony fish in the world, measuring up to 10 feet (3 meters) long and weighing more than 4,400 lbs. M alexandrini's distribution are not well studied but are predicted to be global (Phillips et al 2017). Scientists have identified the babies of one of the world's biggest fishes — the mola, or sunfish — and the youngster is so small that you could easily fit a dozen of them on your fingertip. Complete Field Guide for Anglers and Divers. Japanese Journal of Ichthyology 52: 35–39. The species isn't dangerous, she said. The fish was slapping the water with its dorsal fin and made no attempt to swim away. Australian Museum scientists Andrew King and Kerryn Parkinson with a sunfish specimen. Mola alexandrini was commonly known as the southern ocean sunfish and thought to be only found in the southern hemisphere. Mola mola. (2,000 kilograms). (2010) World Register of Marine Species (WoRMS). 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