Chondrichythyes (Cartilaginous fish): It includes close 600 living species . it includes sharks, saw fishes, rays, skates etc.
Shark: is a marine cartilage fish unremarkably institute along Indian coast. It is fast swimmer, carnivorous inwards feeding. Sexes exhibit sexual dimorphism every bit manly individual has claspers . So fertilization is internal. Development is straight as well as woman individual is ovo viviparous.
Ray: It is a marine as well as benthonic cartilage fish. It swims past times flapping activeness of pectoral fins, carnivorus inwards feeding as well as shows branchial respiration. It defends itself past times producing electrical electric flow from the electrical organs. Male has claspers, as well as then the fertilization is internal. Female is oviparous.
Sharks | Rays |
Laterally compressed | Dorsoventrally flat |
Gill slits: Lateral inwards position | Gill slits: Ventral inwards position |
Distinct as well as non fused amongst the head | Fused amongst the caput as well as large sized |
Spiracle present. Small as well as lateral | Always present. Large as well as dorsal bottom feeder |
Feeding Surface feeder | Bottom feeder |
Fast swimmer | Slow swimmer past times flapping activeness of pectoral fins. |
Ovo-viviparous | Oviparous |
Scoliodon (Dog fish); Zygaena (Hammer headed fish) | Torpedo (Electric ray), Trygon(Sting ray) |
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