ajkule _ shark in the Aqvarium Niagare

Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other

Uploaded: Oct 20, 2015

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Tags: voda, aqvarium, ajkula, shark, ribica, fish

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published 1 year ago
priroda
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