Fish Marine Life Ocean Fauna Flora Souvenir Sheet of 5 Stamps Mint NH World Cup A seashell is usually the

A seashell is usually the exoskeleton of an invertebrate (an animal without a backbone)

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Fish Marine Life Ocean Fauna Flora Souvenir Sheet of 5 Stamps Mint NH World Cup A seashell is usually theComoros Fish Marine Life Ocean Fauna Flora Souvenir Sheet of 5 Stamps Mint NH Fish are gill bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe finned fishes, so cladistically they are fish as well.