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  2. Sunflower sea star - Wikipedia

    en.wikipedia.org/wiki/Sunflower_sea_star

    Underside of a sunflower sea star. Sunflower sea stars can reach an arm span of 1 m (3.3 ft). They are the heaviest known sea star, weighing about 5 kg. [4] They are the second-biggest sea star in the world, second only to the little known deep water Midgardia xandaros, whose arm span is 134 cm (53 in) and whose body is 2.6 cm (roughly 1 inch) wide. [7]

  3. Sand dollar - Wikipedia

    en.wikipedia.org/wiki/Sand_dollar

    Sand dollars diverged from the other irregular echinoids, namely the cassiduloids, during the early Jurassic, [5] with the first true sand dollar genus, Togocyamus, arising during the Paleocene. Soon after Togocyamus, more modern-looking groups emerged during the Eocene. [1] Sand dollars are small in size, averaging from 80 to 100 mm (3 to 4 ...

  4. Starfish - Wikipedia

    en.wikipedia.org/wiki/Starfish

    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

  5. Starfish bodies aren’t bodies at all, study finds - AOL

    www.aol.com/starfish-body-head-crawling-along...

    A starfish has five identical arms with a layer of “tube feet” beneath them that can help the marine creature move along the seafloor, causing naturalists to puzzle over whether sea stars have ...

  6. Here’s what to do if you find a jellyfish, starfish or ...

    www.aol.com/jellyfish-starfish-octopus-sc-beach...

    Jellyfish, starfish, sand dollars and the occasional octopus wash up on South Carolina beaches all year round. For these invertebrates, sitting exposed to the sun and air will eventually kill them.

  7. Tube feet - Wikipedia

    en.wikipedia.org/wiki/Tube_feet

    Sea urchin tube feet extended past the spines.. Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, such as the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittle stars, and have only a feeding function in feather stars.

  8. Pisaster brevispinus - Wikipedia

    en.wikipedia.org/wiki/Pisaster_brevispinus

    It will eat sand dollars, snails, including Kellet's whelk, [7] barnacles, polychaete worms, and small Dungeness crabs. It feeds on carrion, including dead fish and squid. [3] [5] It is competitive with sunflower stars and will fight with them over prey items. [9]

  9. Rotulidae - Wikipedia

    en.wikipedia.org/wiki/Rotulidae

    Rotulidae is a family of small sand dollars native to the Atlantic coast of Africa, with 3 genera, with Rotula and Heliophora being extant, the other, Rotuloidea, being extinct since the Pliocene, but all three being found in the fossil record along the Atlantic African coast since the Miocene.