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The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
The Galapagos shark (Carcharhinus galapagensis) is a species of requiem shark, in the family Carcharhinidae, found worldwide.It favors clear reef environments around oceanic islands, where it is often the most abundant shark species.
The basking shark (Cetorhinus maximus) is the second-largest living shark and fish, [4] after the whale shark. It is one of three plankton-eating shark species, along with the whale shark and megamouth shark. Typically, basking sharks reach 7.9 m (26 ft) in length.
This species of hammerhead shark is the most recently discovered out of the ten species. It was documented by Carter Gilbert in 1967 when a specimen was caught off Charleston, SC.
Niamh Ní Dhrisceoil is used to seeing all types of sea life in her job as a skipper of the Cape Clear Ferry in County Cork, Ireland. However, Niamh was stunned and delighted by the sight of ...
[7] Another problem aquarists keeping sharks with other types of fish have encountered is that the smaller, more passive aquarium-friendly shark species often have difficulty competing with their tankmates for the food provided by the aquarist. [7] Sharks are predatory themselves and may maul or consume tankmates smaller or weaker than ...
Along with the grey reef shark (C. amblyrhinchos) and the whitetip reef shark (Triaenodon obesus), the blacktip reef shark is one of the three most common sharks inhabiting coral reefs in the Indo-Pacific. This species predominates in shallow habitats, while the other two are mostly found deeper.
Shark research is hard to get funding for, in part, because sharks aren’t a commercial species. Yet the irony is that they affect commercial species, namely fish populations.