Asteroidea
Five-armed marine invertebrates
Asteroidea is the taxonomic class comprising starfish (also called sea stars)—marine invertebrates with radial symmetry, typically five arms, and the ability to regenerate lost limbs.
The name derives from Greek words meaning star-like.
The class Asteroidea contains over 1,800 species found in oceans worldwide.
Spiny-skinned marine invertebrate
- starfishFive-armed marine invertebrate
- phylumMajor classification rank
- classGrouping by shared traits
- invertebrateAnimal sans backbone
Organism that consumes others
- musselEdible two-shelled mollusk
- clamSand-dwelling hinged shellfish
- oysterPearl-bearing edible mollusk
- coralMarine skeletal formation
benthos · intertidal · reef · kelp forest · keystone species · crown-of-thorns · outbreak · scavenger
Study of sea organisms
- aquariumTank for keeping fish
- specimenIndividual for examination
- dissectionAnatomical cutting and examination
- laboratoryFacility for scientific investigation
tide pool · collection · museum · paleontology · fossil · Ordovician · zoology · taxonomy
Upper body limb
- rayNarrow light emission
- ambulacral grooveEchinoderm's radial channel
- pyloric caecaDigestive blind sacs
- ossicleDiminutive skeletal element
eyespot · ampulla · gonad · regeneration · mouth · anus · skeleton · spines
Releasing eggs to reproduce
- larvaImmature feeding stage
- metamorphosisProfound biological restructuring
- regenerationBiological self-repair process
- asexualWithout erotic attraction
fission · brooding · planktonic · fertilization · gonads · gametes · settlement · juvenile
echinoderm
Spiny-skinned marine invertebrate
invertebrate · marine · radial symmetry · ossicles · tube feet
predator
Organism that consumes others
- musselEdible two-shelled mollusk
- clamSand-dwelling hinged shellfish
- oysterPearl-bearing edible mollusk
coral · benthos · intertidal · reef · kelp forest · keystone species · crown-of-thorns · outbreak · scavenger · detritivore
marine biology
Study of sea organisms
- aquariumTank for keeping fish
- specimenIndividual for examination
- dissectionAnatomical cutting and examination
laboratory · tide pool · collection · museum · paleontology · fossil · Ordovician · zoology · taxonomy · phylogenetics
arm
Upper body limb
- rayNarrow light emission
- ambulacral grooveEchinoderm's radial channel
- pyloric caecaDigestive blind sacs
ossicle · eyespot · ampulla · gonad · regeneration · mouth · anus · skeleton · spines
spawning
Releasing eggs to reproduce
- larvaImmature feeding stage
- metamorphosisProfound biological restructuring
- regenerationBiological self-repair process
asexual · fission · brooding · planktonic · fertilization · gonads · gametes · settlement · juvenile · clone
- echinodermssea urchin, echinoderm, sea cucumber, sand dollar, starfish
Asteroideabony fish
Fish with calcified skeleton
Pisces · vertebrates · Chondrichthyes · jellyfish · cuttlefish
AsteroideaChordata
Phylum featuring notochords
Arthropoda · Mollusca · fish · crustaceans · cephalopods
- asteroid beltPlanetary rubble orbit zone
- asteroid impactSpace rock collision event
- asteroid miningHarvesting materials from celestial bodies