Sea stars are actually part of the phylum Echinoderm and are related to sea urchins, brittle stars and sea cucumbers – they are not fish at all! most Benthic (bottom bwelling) Sea stars and Sea cucumbers are mostly found in the deep sea. One reason for this may be because of the way they reproduce, by spawning: females cast eggs into the water, and males cast sperm into the water; it mixes and creates sea star embryos. Giant clams reproduce via external fertilization, where eggs and sperm are released into the water column at the same time. Water enters the body, passe though a series of canals in animal's body. Fish are vertebrates; sea stars are invertebrates. Details. It preys on mollusks.It can grow as large as 24 in (61 cm) in diameter. The biggest sea star is the Giant Sea Star that can reach 3 feet in diameter, while the smallest one, Patririella Parvivipara is … Echinoderm prey. A sea star's mouth is on its underside. When it catches its food, the sea star will wrap its arms around the animal's shell and pull it open just slightly. Fish are typically covered with scales; sea stars are typically covered with spines. However, giant clams are cemented to the reef surface, so they are only able to reproduce with other individuals that are close by. Known occurrences, collected specimens and observations of Giant sea star. It then digests the animal and slides its stomach back into its own body. Echinoderm Habitat. Its living, and it has to reproduce. They have sexual reproduction. There are some 2,000 species of sea star living in all the world’s oceans, from tropical habitats to the cold seafloor. Stars also could be considered living, because stars have astrocyte. Most species are small to medium-sized between 12-24 cm (4.7-9.4 in). Stars, no one has really known if there living or non living. Sea stars are often found in groups—or in close proximity to one another. Then it does something amazing: the sea star pushes its stomach through its mouth and into the bivalve's shell. Water vascular system. Its color varies from brown to red or purple. Basically star cells, and if something has cells. The blood star, with its bright red (or orange or yellow) color, feeds on sponges.Most of the other tide pool animals can eat very tiny sea stars, but no tide pool animal can eat an adult sea star. Image Dimensions: 1692 x 1398. In contrast to pale, sick specimens, healthy sea stars are vibrantly colored, active predators, like this giant sea star (Pisaster giganteus) with a captured cowrie snail. They do 'produce' black holes, which could be relevant to your question reproducing. But some of them can reach 1-2 feet (30-60 cm) diameter size and weigh up to 5 kg (11 lbs)! Sea stars dine out (or in, if you're a mollusk) on mussels, snails, oysters, worms and crustaceans.Some sea stars scavenge for decaying matter (or detritus) on the surface of the mud. Starfish is the common name for a group of animals called sea stars. Pisaster giganteus, the giant sea star or giant spined star, is a species of sea star that lives along the western coast of North America from Southern California to British Columbia.It makes its home on rocky shores near the low tide mark. Photographer Sea stars reproduce sexually like normal animals in the sea. Therefore, individuals of this species are simultaneous hermaphrodites. View this species on GBIF . When it’s a starfish! 2005 California Academy of Sciences cc-by-nc-sa-3.0 Giant sea star includes 2 children: Pisaster giganteus capitatus (Stimpson 1861)
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