![]() 2008, and Chimaera opalescens Luchetti et al. can be distinguished from its morphologically similar congeners, Chimaera obscuraĭidier et al. Structure of the NADH2 gene.Ĭhimaera didierae, sp. nov., is the seventh species of chimaera known from the Indian Ocean, and is distinguishable from other members of the genus by the following combination of characters: medium-bodied slender species, short trunk, long tail, with moderately sized head, large eyes, without well-defined suborbital ridge short thin snout uniform light toffee-tan color, not iridescent, without defined patterning, spots, reticulations, or mottling, dark, sooty brown on snout, white blotching around mouth pectoral fins long and thin, anterior margin 33.7% BDL, pectoral fin width 16.7% BDL dorsal spine height >21.6% BDL, equal or subequal to height of first dorsal fin second dorsal fin very long and low, anterior height 2.7% BDL, not undulating caudal fin small and slender, dorsal caudal height 1.8% BDL, ventral caudal height 1.1% BDL. But what motivates me most to study chimeras were the huge information gaps in my region and the complete lack of public awareness about these fishes.Original diagnose after CLERKIN, EBERT & KEMPER, 2017 : Chimaera didierae, sp. Information is key to identify the possible impacts of fishing in these fishes and to understand what actions to take for its fisheries management and conservation.Īs a marine biologist, I’m interested in many fishes, especially sharks and rays, but chimaeras are the most interesting fish I have encountered. But we still know very little about chimaeras. In some fisheries of the northern region of the peninsula of Baja California, Mexico, chimaeras are incidentally caught. It is also common to observe chimeras in videos of deep-sea exploration with submarines, and this has given us an excellent opportunity to see the chimaeras in their natural habitat. While chimeras live in hard-to-reach places, they are sometimes caught incidentally by deep-sea fishing nets. They also called spook fish or ghost shark because of their spectral appearance, but don’t be afraid, chimaeras are strange but have some charm.Ĭhimaeras eggs cases. Due to their teeth, chimaeras are commonly known as ratfish or rabbitfish. Chimaeras have large eyes, a single gill opening, and a small mouth with a particular pair of teeth in the lower jaw which pops out from the mouth like rodents’ incisors. Their size, when adults range from 60 to 150 cm. ![]() These fishes have an elongated and cone-shaped body whit a whip-like tail and smooth skin without scales. There are around 49 species of chimaeras in the world so far. This group includes the Elasmobranch, (sharks, skates, and rays) and Holocephalans, in which are the Chimaeras that evolved with different characteristics from elasmobranchs 400 million years ago. Chondrichthyans are fishes with cartilage skeletons (similar to our ears). In this post, I´ll try to go “deep” into these amazing fishes. Chimaeras also have less coverage in the media compared to their most famous relatives, the sharks. You may never hear about them, because they commonly live in deep waters up to 3000 meters, and it’s challenging to study them in their natural habitat. Chimaeras are fishes closely related to sharks, skates, and rays.
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