Starfish have got absolutely nothing to do with fish. Their name originates from antiquity, when everything living in water was called a fish, whatever it looked like. In those days, little was known about classes of life, and that is why many totally unrelated creatures are called fish, such as jellyfish (cnidarians) starfish, and even headless chicken fish, a popular name given to a deep water sea cucumber (coincidentally one of the sea star's closest relatives).
Starfish are now officially known as sea stars.
They are echinoderms. Echinoderms are a totally unrelated to fish. They are a huge group. Their members include sea stars, sea cucumbers, brittlestars, sea urchins and crinoids. The group is actually a phylum of its own, on the same rank as chordata, which are basically vertebrates and a few other creatures. In other words, the echinoderm group is the same rank as the group containing all mammals, reptiles, amphibians, birds, fish and many others.
Echinoderms are the only group of animals which have radial symetry, in other words, more than a single symmetry. Common sea stars have fivefold symmetry, meaning five different divisions, but some other echinoderms can have fewer or many more symetries. Characteristic of many echinoderms are their tube feet. They come in their hundreds, and each moves indepentantly, carrying the echinoderm along. In starfish, these tube feet are present on the underside beneath the arms. In urchins, they are below the rounded body, pretty much the only place with an absence of spines. In sea cucumbers, they are on the underside of the body. Brittlestars and basket stars do not have tube feet. Instead they use their arms for locomotion. They are also the only echinoderms capable of free swimming. Crinoids are have no tube feet, and most are either carried by currenty or are attached to the rock. These have been known ot move, however.
Echinoderms are one of the few phyla which have no representatives living on land or in fresh water. They rely on the seawater for everything, even using it as their blood.
Sea stars have their own class within the echinoderms: Asteroidea.
Here is the classification of the most well known of starfish, the common sea star.
Kingdom:
Animalia (All animals)Phylum:Echinodermata (Echinoderms)Class:Asteroidea (All starfish)Order:ForcipulatidaFamily:AsteriidaeGenus:AsteriasSpecies:Asterias rubens
Invertebrate, echinoderm,
It's a fish
echinoderms which means (spiny skin)
No. Homo sapiens is the taxonomical name for human beings. Starfish belong to the Asteroidea class.
Starfish or sea stars are echinoderms belonging to the class Asteroidea. The names "starfish" and "sea star" essentially refer to members of the Class Asteroidea. However, common usage frequently finds "starfish" and "sea star" also applied to ophiuroids which are correctly referred to as "brittle stars" or "basket stars".
there are cusion starfish, reef starfish, spiny starfish and fire brick starfish in new zealand.
It is called toilet water.
I think its Sea Star because starfish aren't actually fish
Yes, because it does not have a backbone.A starfish is an invertebrate.Yes! :) Because it doesn't have backbone .yupyes!! star fish is an invertebrate!starfish is an invertebrate, precisely phylum echinodermata.Yes the starfish is an invertabrate. Whoever thought it wasn't an invertebrate because it was an echinoderm is a nimrod because an echinoderm is a classification of an invertevbrate. i am in 8th grade and my textbook says it is an invertebrate, and my teacher is awesome. Your welcome.
Yes they can
Sure, starfish larvae are planktonic. Adult starfish are not.
Starfish Ancestors