sharks invertebrates

Are There Any Fish That Are Invertebrates?

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Are There Any Fish That Are Invertebrates? Marine invertebrates include crustaceans (such as crabs, rock lobsters and prawns), molluscs (abalone, oysters and scallops), sponges, corals, sea cucumbers and nudibranchs. They range in size from microscopic organisms to up to a metre in length and come in a variety of shapes and sizes. What freshwater fish

Are Sharks Cartilaginous Fish?

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Are Sharks Cartilaginous Fish? Sharks, skates, rays and chimaeras stand apart from other jawed vertebrates in having a skeleton that is made primarily of cartilage rather than bone. Why are sharks cartilaginous fish? Modern sharks most likely evolved their lighter cartilaginous skeletons to become faster swimmers, to evade predators and swiftly catch their prey. The