chimaera


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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 ?
Reported catches of sharks, rays and chimaeras peaked in 2003 and have been dominated by rays for the last 40 years.
The researchers found that sharks, rays and chimaeras face a substantially higher risk of extinction than do most other animals.
Sharks, rays, and chimaeras tend to grow slowly and produce few young, leaving them particularly vulnerable to overfishing," says Sonja Fordham, IUCN SSG Deputy Chair and president of Shark Advocates International.
By saying goodbye (and not good night, unlike the general) to his father, the son does not so much repudiate his father as he frees himself from him to conquer the right of inventing his own truth by sublimating the real, that is, bringing it beyond the threshold (limen) of its limitations or capabilities and opening it to another realm whose legitimacy the general denies as chimaera.
Earlier this year he bought his mum a flashy TVR Chimaera sports car, but Paolo himself is still learning to drive in an old banger which his parents use at their chip shop.
PAOLO NUTINI has splashed out on a TVR Chimaera sports car - but cannot drive it out of his garage.
ANZ Banking Group Ltd (ANZ) (NYSE: ANZ) has announced that it has appointed receivers to Primebroker Securities Ltd, part of the Chimaera Financial Group.
The Chimaera of His Age: Studies on Bernard of Clairvaux, Studies in Medieval Cistercian History 5, Cistercian Studies Series 63 (Kalamazoo, MI: Cistercian Publications, 1980), p.
Ars Chimaera confronts problems that by right make this artistic trend revolutionary indeed.
Her Chimaera Pottery workshop in Broome has two kilns.
Lizzy's current project is her TVR Chimaera, which is being fully restored with a colour change re-spray with airbrush design, alloy wheels, custom leather interior and fabricated dash with digital dials.
Further, this chimaera is a fabrication; a myth constructed by "we" humans, who have a vested interest in our self-proclaimed superiority.