Fish of the group Holocephali. Chimaeras have thick bodies that taper to a long thin tail, large fins, smooth skin, and a cartilaginous skeleton. They can grow to 1.5 m/4.5 ft. Most chimaeras are deep-water fish, and even Chimaera monstrosa, a relatively shallow-living form caught around European coasts, lives at a depth of 300–500 m/1,000–1,600 ft.

ETYM New Lat. Related to Chimera.
In Greek mythology, a fire-breathing animal with a lion's head, a goat's body, and a tail in the form of a snake; hence any apparent hybrid of two or more creatures. The chimera was killed by the hero Bellerophon on the winged horse Pegasus.
Imaginary monster; bogy; impossible idea.
Smooth-skinned deep-sea fish with a tapering body and long threadlike tail.