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Red-knobbed starfish: Indian Ocean Protoreaster nodosus (Linnaeus, 1758) Chocolate chip sea star: Indian Ocean and western Pacific ocean Protoreaster nodulosus (Perrier, 1875) Knobbly seastar: North Western Australia
Mummified P. lincki for sale in Tanzania. Their sale contributes to the rarefaction of this species. P. lincki grows to a maximum diameter of 12 in (30 cm). It has numerous tubercles located along its five arms. These tubercles are bright red and extend upward from the arms. It has a gray body with red stripes that connect the tubercles.
When L. clathrata loses part or all of an arm through predation, it can regenerate the limb.The damaged area is sealed off, and a new small arm-tip appears within a week. Subsequent development is at the rate of about 3.7 mm (0.15 in) a month, although this slows down when regeneration is nearly complete.
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ ˌ æ s t ə ˈ r ɔɪ d i ə /). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class
Zoombezi Bay (/ z uː m ˌ b iː z i ˈ b eɪ /) is a 22.7-acre (9.2 ha) water park owned by the Columbus Zoo and Aquarium near Powell, Ohio just north of Columbus. The park sits on the site of the former Wyandot Lake Adventure Park, [1] which was purchased by the Columbus Zoo and Aquarium in 2006. Zoombezi Bay opened to the public on May 26 ...
Asteriacites, a trace fossil of an ophiuroid; Carmel Formation (Middle Jurassic), near Gunlock, Utah; scale bar is 10 mm. Of all echinoderms, the Ophiuroidea may have the strongest tendency toward five-segment radial (pentaradial) symmetry. The body outline is similar to that of starfish, in that ophiuroids have five arms joined to a central ...
An echinoderm (/ ɪ ˈ k aɪ n ə ˌ d ɜːr m, ˈ ɛ k ə-/) [2] is any animal of the phylum Echinodermata (/ ɪ ˌ k aɪ n oʊ ˈ d ɜːr m ə t ə /), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". [3]
Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, the face of a human being has a plane of symmetry down its centre, or a pine cone displays a clear symmetrical spiral pattern.