Sea stars? Starfish? What’s the difference? — Norfolk Island's Reef

Starfish or sea stars are a class of marine invertebrates generally shaped like a star polygon. (In common usage, these names are also often applied to ophiuroids, which are correctly referred to as brittle stars or basket stars.) Starfish are also known as asteroids because they form the taxonomic class Asteroidea (/ ˌæstəˈrɔɪdiə /). About 1,900 species of starfish live on the seabed.. Red: Many species, like the Red Sea Star, showcase vivid red hues. Orange: Common in species like the Orange Starfish, often found in coral reefs. Blue: The Blue Linckia is a popular example, displaying bright blue tones. Purple: Some starfish, such as the Royal Starfish, feature deep purple shades. Brown and Gray: These colors are often seen in species that inhabit rocky or sandy environments.

A star-shape invertebrate, symbol of the seas and oceans Starfish (or sea stars) are one of the symbols of the oceans. There are about 1500 species of starfish, which occurs in all the seas and oceans of the world. Their star-shaped body (typically with 5 arms, but sometimes more) and their bright colors make them one of the snorkelers' favorite sightings.. Ochre sea stars are the most common sea stars found in the waters around Vancouver Island, and we see them in three distinct colours: purple, orange, and red-brown. What causes one ochre star to be purple while its neighbour is orange and the next star over is brown? Scientists don't know for sure what causes ochre sea stars' varied colour schemes, but several theories currently exist.