Norbert Wu / Spotted Ratfish (Hydrolagus colliei) usually a deep dwelling fish, Alaska

Norbert Wu / Sunflower Sea Star (Pycnopodia helianthoides) and Purple Sea Urchin (Strongylocentrotus purpuratus) in feeding on Frilled Sea Anemones (Metridium senile), Vancouver Island, British Columbia, Canada

Norbert Wu / Quillback Rockfish (Sebastes maliger) amid Frilled Sea Anemones (Metridium senile), the fish live to 95 years, late sexual maturity makes them vulnerable to overfishing, Alaska

Scott Leslie / Frilled Sea Anemone (Metridium senile) group, Nova Scotia, Canada

Scott Leslie / Frilled Sea Anemone (Metridium senile) group showing extended tentacles, Nova Scotia, Canada

Norbert Wu / Frilled Sea Anemone (Metridium senile) and Sea Urchin, Queen Charlotte Islands, Canada

Fred Bavendam / Frilled Sea Anemone (Metridium senile) surrounded by genetic clones of an Orange Frilled Sea Anemone, British Columbia, Canada

Fred Bavendam / Frilled Sea Anemone (Metridium sp) growing on shallow rocks near the south end of Browning Pass affected by ocean currents, British Columbia, Canada

Fred Bavendam / Lion's Mane (Cyanea capillata) jellyfish ensnared by a Frilled Sea Anemone (Metridium senile), British Columbia, Canada

Norbert Wu / Frilled Sea Anemone (Metridium senile) field with sea star at base, southeast Alaska

Norbert Wu / Frilled Sea Anemone (Metridium senile) group, Leather Star (Dermasterias imbricata) and Orange Sun Star (Solaster stimpsoni), Vancouver Island, British Columbia, Canada

Norbert Wu / Frilled Sea Anemone (Metridium senile) group, Giant Green Sea Anemones (Anthopleura xanthogrammica) and Ochreous Starfish (Pisaster ochraceus), Vancouver Island, British Columbia, Canada