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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
- Asteroidea, Blainville, 1830
- Animalia
Die Starfish Retrospektive ist eine Variante einer Retrospektive, bei der das Team in fünf Kategorien sternförmig über seine Erkenntnisse und Probleme austauscht. Die Starfish Retrospektive ist eine Methode, um die Zusammenarbeit zu verbessern, indem man die Aspekte der Zusammenarbeit in fünf Kategorien eingeordnet: Start, Do, More, Stop, Keep und Gen.
- Population
- Defensive Adaptations
- Regeneration
- Unusual Feeding
- GeneratedCaptionsTabForHeroSec
There are some 2,000 species of sea star living in all the world’s oceans, from tropical habitats to the cold seafloor. The five-arm varieties are the most common, hence their name, but species with 10, 20, and even 40 arms exist.
They have bony, calcified skin, which protects them from most predators, and many wear striking colors that camouflage them or scare off potential attackers. Purely marine animals, there are no freshwater sea stars, and only a few live in brackish water.
Beyond their distinctive shape, sea stars are famous for their ability to regenerate limbs, and in some cases, entire bodies. They accomplish this by housing most or all of their vital organs in their arms. Some require the central body to be intact to regenerate, but a few species can grow an entirely new sea star just from a portion of a severed ...
Most sea stars also have the remarkable ability to consume prey outside their bodies. Using tiny, suction-cupped tube feet, they pry open clams or oysters, and their sack-like cardiac stomach emerges from their mouth and oozes inside the shell. The stomach then envelops the prey to digest it, and finally withdraws back into the body.
Learn about the diverse and adaptable sea stars, also known as starfish, that live in all the world's oceans. Find out how they regenerate limbs, feed on clams, and face threats from a syndrome known as sea star wasting disease.
- 4 Min.
Learn about starfish, the invertebrates that are fish with spiny skin and five arms. Find out how they live, eat, grow and defend themselves in the ocean. Discover their diversity, from blue to red, and see pictures of different species.
3. Mai 2024 · Learn about sea stars, also known as starfish, spiny-skinned invertebrates with rays or arms. Find out how they feed, reproduce, and belong to three orders of echinoderms.
- The Editors of Encyclopaedia Britannica
Learn about starfish, or sea star, a group of 1,800 echinoderm species with regenerable arms and tube feet. Find out how they move, feed, and reproduce in different ocean habitats.
Learn about sea stars, the invertebrate animals that have five arms and can creep along the ocean floor. Find out how they eat, where they live, and why they are important for the ocean ecosystem.
