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Around 1,500 living species of starfish occur on the seabed in all the world's oceans, from the tropics to subzero polar waters. They are found from the intertidal zone down to abyssal depths, 6,000m below the surface. Starfish typically have a central disc and five arms, though some species have a larger number of arms.
Sea stars occupy every type of habitat, including tidal pools, rocky shores, sea grass, kelp beds, and coral reefs. Some sea stars even live in sands as deep as 20,530 feet (9,000 meters)....
There are about 1,800 species, or kinds, of sea stars. They can be brown, red, orange, pink, or other colors. Most sea stars are 8 to 12 inches (20 to 30 centimeters) across.
There are about 1,600 living species of sea stars. They inhabit all the oceans of the world, and the most varieties occur in the northern Pacific Ocean. Sea stars range in color from brown to orange to pink. Most adult sea stars reach average sizes of from 8 to 12 inches (20 to 30 centimeters) across.
Food webs throughout the world all have the same basic trophic levels. However, the number and type of species that make up each level varies greatly between different areas and different ecosystems. Download a PDF of this diagram.
5 dni temu · The Asteroidea (also known as sea stars or starfish) are among the most diverse and familiar of the living Echinodermata, including over 1800 species from every ocean basin in the world, including the Atlantic, Indian, and Pacific as well as the Arctic and the Southern Ocean, inhabiting intertidal to 6000 m abyssal settings.
About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at 6,000 m (20,000 ft) below the surface. Starfish are marine invertebrates.