Starfish
ExploreInvertebrate
Starfish
unclassified Asterina (in: starfish)
Starfish are fascinating creatures that live in the ocean. They have five arms and come in many colors like orange, red, and blue. Starfish can regenerate lost arms if they get hurt.
Habitat: Coastal areas
Appearance
The Starfish has a central disc with five (or more!) radial arms, giving it a distinct star shape. Its skin can be spiny or smooth, often in vibrant colours like orange, red, blue, or purple, making it stand out from plain rocks.
KingdomAnimaliaPhylumEchinodermataClassAsteroideaOrderValvatidaFamilyAsterinidaeGenusAsterina
Category
InvertebrateRarity
Common
Danger
2/5 · Low
Snaps
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Interesting facts
Certain deep-sea starfish can glow in the dark, creating their own light!
Some starfish, like the Crown-of-Thorns, have venomous spines that sting.
Starfish aren't fish at all; they are echinoderms, related to sea urchins!
They don't have a brain or blood, but use seawater for circulation and movement!
Special abilities
Ability
Regenerating Limbs
Starfish can regrow lost arms, and sometimes even an entire new body from a single arm, helping them survive attacks.
Ability
Stomach Extrusion
Starfish can push their stomach out of their body to digest prey externally, allowing them to eat larger food.
Ability
Tube Feet Grip
Starfish have hundreds of tiny tube feet with suckers that help them move slowly and cling firmly to rocky surfaces.
Measurements & details
- Average Size
- 15 cm
- Average Weight
- 75 g
- Lifespan
- 8 years
- Speed Cm Per
- 12+
Diet & Feeding
Starfish are mostly predators, eating shellfish and other small invertebrates.
Primary Foods
- clams
- mussels
- oysters
- snails
- barnacles
- sea anemones
Foraging Method
- Foraging
Ecological connections
eaten by
Blue Mussel
Mytilus edulis
Common food for many starfish species.
eats
Sea Otter
Enhydra lutris
Sea otters prey on certain starfish species.
eaten by
Staghorn Coral
Acropora cervicornis
Crown-of-thorns starfish can decimate coral reefs.
Traits
Camouflaged
Camouflaged describes organisms that possess coloring or patterns that allow them to blend into their environment.
Filter Feeder
Filter feeders obtain nutrients by straining suspended food particles and small organisms from water.
Ancient Lineage
This trait signifies organisms belonging to a very old evolutionary group with ancestors dating back millions of years.
Coastal
Coastal habitats are dynamic environments located along the interface between land and sea, influenced by tides, waves, and saltwater.
Armored
Armored describes animals protected by a hard, external covering or shell for defense.
Carnivorous
This trait identifies organisms whose diet consists entirely or primarily of animal tissue.
Keystone Species
Describes a species whose presence and role have a disproportionately large effect on its environment.
Regenerative
Regenerative organisms possess the ability to regrow lost or damaged body parts, tissues, or organs.
Nocturnal
Nocturnal animals are primarily active during the nighttime hours, typically resting or sleeping during the day.
Also known as
No aliases listed yet.
Collections
Safety
Danger
2/5 · Low
If you find a starfish on the beach, gently observe without touching or taking it out of the water.
Frequently Asked Questions
How big is Starfish?
15 cm
How much does Starfish weigh?
75 g
How long does Starfish live?
8 years
What does Starfish eat?
Starfish are mostly predators, eating shellfish and other small invertebrates.
Where is Starfish usually found?
Coastal areas
How does Starfish hunt?
Foraging
How fast can Starfish move?
12+
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