chimaera

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Related to Ghost shark: Frilled shark

chimaera

(kĭmēr`ə), cartilaginous marine fish, related to the sharks. Also called ratfishes, chimaeras are found in temperate oceans throughout the world, mostly in deep water. They have large heads, long, thin, ratlike tails, and large, fanlike pectoral fins. In many species there is a poison spine in front of the first dorsal fin. Their slippery skins are black, gray, or silver, often with stripes or spots. The largest reach a length of about 6 1-2 ft (2 m). Chimaeras resemble sharks in certain fundamental respects: They have cartilage skeletons, males have claspers for internal fertilization of females, and females lay eggs encased in leathery cases. However, they resemble the bony fishes in having the upper jaw fused to the skull, the gill slits opening into a single chamber, a bony covering, or operculum, over the gill slits, and separate anal and urogenital openings. A distinctive feature of chimaeras is the presence of extra claspers in the male, one in front of each pelvic fin and a prominent one on the forehead. The function of these appendages is not known, but they are thought to play a role in courtship. Chimaeras form the subclass Holocephali of the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Chondrichthyes.

chimera

, chimaera
1. Greek myth a fire-breathing monster with the head of a lion, body of a goat, and tail of a serpent
2. a fabulous beast made up of parts taken from various animals
3. Biology an organism, esp a cultivated plant, consisting of at least two genetically different kinds of tissue as a result of mutation, grafting, etc.
References in periodicals archive ?
There's still a lot to be learned about ghost sharks, as they have not been observed much in the wild and many of their species have been discovered only in recent years.
The discovery was technically made seven years ago, but researchers couldn't confirm whether or not what they were seeing was an actual ghost shark.
Pristis microdon belongs to the wideranging family of cartilaginous fishes called elasmobranchs (from the Greek words elasmos, meaning beaten metal and bragkhia, meaning gills) which includes sharks, rays and chimaeras or ghost sharks.
The duo will see goblin sharks as well as sawsharks, ghost sharks, frilled sharks and the luminescent lantern shark.