SUN STAR
Solaster spp.
DESCRIPTION
Sun Star (Solaster spp.) is a genus of sea stars characterized by their distinctive star-like shape and numerous arms, typically ranging from 5 to 16. They exhibit a variety of colors, including shades of orange, yellow, and brown, which can help them blend into their rocky or sandy habitats. These echinoderms are primarily found in cold waters and are known for their predatory behavior, often preying on bivalves and other invertebrates.
FUN FACTS
- Sun Stars have the ability to regenerate lost arms, which can take several months to fully regrow
- This remarkable ability allows them to survive encounters with predators and continue to thrive in their environments
- | They possess a unique feeding mechanism where they can evert their stomachs to digest prey externally, allowing them to consume larger prey than their mouth would normally accommodate
- This adaptation is particularly useful for feeding on bivalves, which are often difficult to access
QUICK INFO
Lifespanup to 10 years in the wild
Average Weight1-2 kg
Average Length30-50 cm
Diet TypeCarnivore
Social Structuresolitary, occasionally found in groups when feeding
Activity PatternDiurnal
Breeding SeasonSpring to early summer
- Habitat
- Sun Stars inhabit a range of marine environments, including rocky substrates, sandy bottoms, and kelp forests. They are typically found at depths from the intertidal zone to deeper waters.
- Biomes
- Marine
- Native Range
- Sun Stars are found in the North Pacific Ocean, from the Arctic regions down to the coasts of California and Japan.
- Continent
- North America, Asia
- Countries
- United States, Canada, Japan, Russia
- Diet
- Sun Stars primarily feed on bivalves, snails, and other small invertebrates. They use their tube feet to pry open the shells of their prey and can evert their stomachs to digest food externally.
- Diet Type
- Carnivore
- Favorite Food
- bivalves, snails
- Social Structure
- solitary, occasionally found in groups when feeding
- Activity Pattern
- Diurnal
- Group Size
- 1-10
- Territorial
- 0
EN
LC
1-2 kg
Weight
30-50 cm
Length
- Coloration
- varies from orange to yellow and brown
- Lifespan
- up to 10 years in the wild
- Offspring per Birth
- thousands of larvae
- Sexual Maturity
- 2-3 years
- Breeding Season
- Spring to early summer
LC
Least Concern
IUCN Red List Status
- Population Status
- Population status is generally stable, but local populations can be affected by environmental changes.
- Wild Population Estimate
- unknown
- Population Trend
- Stable
- Endangered
- 0
- Threats
- Main threats include habitat destruction and climate change, which can affect their food sources and habitats. Overfishing of their prey species can also impact their populations.
- Predators
- sea otters, large fish, and some species of crabs
- Defense Mechanisms
- Sun Stars can regenerate lost arms, which helps them escape predation. Their tough, spiny skin also provides some protection against predators.
- Compatible Animals
- none
- Found in Zoos
- Rare