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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 556 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
There are numerous species of sharks found in the Pacific Ocean; of these sharks, 36 [1] have habitat ranges throughout the coastlines and surrounding waters of California, as identified below. Identifications include common names; scientific names; the taxonomic rank, family; conservation statuses according to IUCN; and an image.
Sharks are found in all seas. They generally do not live in fresh water, with a few exceptions such as the bull shark and the river shark which can swim both in seawater and freshwater. [102] Sharks are common down to depths of 2,000 metres (7,000 ft), and some live even deeper, but they are almost entirely absent below 3,000 metres (10,000 ft).
There are 44 species of shark found in the Red Sea. [1] This list is not exhaustive. Bathydemersal species. Scientific name ... List of sharks in the Red Sea.
The species lives in the deep waters of the Pacific Ocean, which NIWA scientist Brit Finucci said makes them difficult to study. One ghost shark was caught on camera swimming off the coast of ...
In the last six years, we've even seen the occasional fin pass by in the ocean and played in shallow waters where we've had to take pause while a herd of nurse sharks passed by (unnerving, yes ...
The river sharks (of the genus Glyphis) live in freshwater and coastal marine environments. The bull shark (Carcharhinus leucas), can swim between salt and fresh water, and are found in tropical rivers around the world. Some prehistoric sharks (in a broad sense), including hybodonts and xenacanths, are also thought to have inhabited freshwater ...
All of which would take more research on the species. 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 ...