Species · GBIF taxon 2256852
Giant Green Anemone
Anthopleura xanthogrammicaAlso known as Green Surf Anemone, Solitary Anemone, Giant Green Sea Anemone
Giant green anemones drape rocky Pacific tide pools in brilliant emerald hues, using a symbiotic relationship with algae and dinoflagellates to thrive in sunlight. These solitary predators use potent stinging cells on their thick tentacles to capture mussels and crabs dislodged by crashing waves. During low tide, they contract into squat, sand-covered columns to prevent drying out.
IntertidalSymbioticMarine
- diet
- Carnivorous (mussels, crabs, sea urchins, and small fish)
- family
- Actiniidae
- threats
- Ocean acidification, coastal pollution, and human trampling
- life Span
- Up to 80 to 150 years
NE
Nematocysts inject venom to paralyze prey; avoid touching tentacles and never touch your eyes afterward.
Nematocysts contain a mix of proteins and toxins that paralyze prey and can cause mild skin irritation or allergic reactions in humans.
Observe without touching, and never touch your eyes or face after contact with tide pool water.- Tide Pool Etiquette: Observe them underwater in tide pools where their tentacles are fully expanded.
- Avoid Poking: Refrain from touching the center, which forces the animal to contract and expend vital energy.
- Look for Algae: Notice how individuals in shaded crevices appear pale or white due to a lack of symbiotic algae.