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The pelagic food web, showing the central involvement of marine microorganisms in how the ocean imports nutrients from and then exports them back to the atmosphere and ocean floor. A marine food web is a food web of marine life. At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton.
The sand tiger shark (Carcharias taurus), grey/gray nurse shark, spotted ragged-tooth shark, or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf , from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft ...
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Sand sharks, also known as sand tiger sharks, gray nurse sharks or ragged tooth sharks, are mackerel sharks of the family Odontaspididae. They are found worldwide in temperate and tropical waters. They are found worldwide in temperate and tropical waters.
Nurse shark (Ginglymostoma cirratum) Will occasionally visit artificial reefs. Sandbar shark (Carcharhinus plumbeus) Common near Sandy Hook. Growing presence nearer to New York City. [19] Sand tiger shark (Carcharias taurus) New York Harbor is an important nursery for the babies. [citation needed] Scalloped hammerhead (Sphyrna lewini).
Several species are apex predators, which are organisms that are at the top of their food chain. Select examples include the bull shark, tiger shark, great white shark, mako sharks, thresher sharks, and hammerhead sharks. Sharks are caught by humans for shark meat or shark fin soup. Many shark populations are threatened by human activities.
Carcharias is a genus of mackerel sharks belonging to the family Odontaspididae (sand sharks). Once bearing many prehistoric species, all have gone extinct with the exception of the critically endangered sand tiger shark .
Sand sharks: 2 3 Sand sharks are so-called because they inhabit sandy shorelines, and are often seen trolling the ocean floor in the surf zone. They are found in warm or temperate waters throughout the world's oceans, except the eastern Pacific. [19] Sand sharks have a large second dorsal fin. They grow up to 10 feet in adult length. [20]