Term
|
Definition
|
|
Term
|
Definition
| 2 dorsal fins w/ or w/o spines, absent anal fin, 5 gill slits, absent nictitating lower eyelid, known primarily from deep waters; include bramble sharks, sleeper sharks, lantern sharks, and dogfishes. |
|
|
Term
|
Definition
| Angel sharks- ray-like bodies, 2 spineless dorsal fins, no anal fin, mouth nearly terminal, up to 2 meters in length |
|
|
Term
|
Definition
| Saw sharks- snout produced like a long flat blade, w/ teeth on each side, no dorsal spines |
|
|
Term
|
Definition
| the rays- all skates and rays. Gill openings are ventral, anterior edge of pectoral enlarged, absent anal fins, body is generally strongly depressed, protrusible jaws. |
|
|
Term
|
Definition
| contains the sawfishes—fishes with the snout produced in a long flat blade with teeth on each side of it—shark-like in appearance |
|
|
Term
|
Definition
| contains the electric rays—fishes with powerful electric organs, skin is loose and soft, eyes small and obsolete; 1 California species |
|
|
Term
|
Definition
| contains the guitarfishes, and all of the skates; caudal fin is moderately well developed although it is absent in some species: dorsal fin is modified to prickels on mid-line of back. Two California guitarfish |
|
|
Term
|
Definition
| contains all of the stingrays and eagle rays; Stingrays (Family Dasyatidae, Urolophidae): no distinct dorsal fin; poisonous (i.e., venomous) spines on tail, often with serrations; several species off California; Eagle rays (Family Myliobatidae): head elevated above the disk, sometimes with spines, small dorsal, (able to leap “tall buildings” with a single bound), cownose rays (huge migrating “herds” of these off the southeast, manta rays, etc.; best known California species is the “Bat Ray” |
|
|
Term
|
Definition
| Horn sharks--- Two dorsal fins, each with a spine; nostrils connecting to mouth in deep groove; small spiracle, eyes w/o nictitating fold, benthic habit |
|
|
Term
|
Definition
| (ground and requiem sharks) make up more than half of the species of euselachians, they are particularly diverse in tropical and subtropical seas: usually with TWO dorsal fins without anterior spines. The eyes have the nictitating membrane; Included are: catsharks of various ilks, houndsharks, and the requiem sharks |
|
|
Term
|
Definition
| (i.e., the mackerel sharks)/offshore pelagic forms ---also with two dorsal fins w/o anterior-margin spines; these include the mako, the white shark; the sand tiger, megamouth, threshers & basking sharks |
|
|
