Difference between cartilaginous fish and bony fish

1.	Difference between cartilaginous fish and bony fish
Answer» Difference Between Cartilaginous Fish and Bony FishCartilaginous FishBony FishBiological ClassificationCartilaginous fishes fall under the class ChondrichthyesAll bony fish fall under the superclass OsteichthyesEndoskeletonPrimarily composed of cartilagePrimarily composed of boneOperculumPresentAbsentTailHeterocercal in natureHomocercal in natureEcosystemMembers primarily inhabit marine ecosystems. However, some exceptions are presentMembers inhabit both marine and freshwater ecosystemsMode of FertilizationInternal (exceptions are present)ExternalSwim BladderAbsent. Buoyancy is maintained with oil stored in livers.Present (except for some bony fishes that dwell in the deep).ExampleGreat white sharks, whale sharks and every other species of sharksSunfish, Tuna, Herring, Trouts etc

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