Franco Banfi / Detail of the mouth of Crimson anemone (Cribrinopsis fernaldi) Vancouver Island, British Columbia, Canada, Pacific Ocean

Franco Banfi / Candy-striped shrimp (Lebbeus grandimanus) on Crimson anemone (Cribrinopsis fernaldi), Alaska, United States, North Pacific Ocean.

Franco Banfi / Candy-striped shrimp (Lebbeus grandimanus) on Crimson anemone (Cribrinopsis fernaldi), Alaska, United States, North Pacific Ocean.

Franco Banfi / Clown shrimp (Lebbeus grandimanus) on Crimson anemone (Cribrinopsis fernaldi) British Columbia, Canada, Pacific Ocean

Pascal Kobeh / Field of Giant plumrose anemones (Metridium giganteum) with a Snakelock anemone / Crimson sea anemone (Cribrinopsis fernaldi) in foreground, Alaska, USA, Gulf of Alaska. Pacific ocean.

Norbert Wu / Clown Shrimp (Lebbeus grandimanus) pair on Fernald Brooding Anemone (Cribrinopsis fernaldi), Vancouver Island, British Columbia, Canada

Sue Daly / Crimson / Rose sea anemone (Cribrinopsis fernaldi) underwater, Pacific coast, Canada, August

Fred Bavendam / Fernald Brooding Anemone (Cribrinopsis fernaldi) spawning, Quadra Island, British Columbia, Canada

Fred Bavendam / Clown Shrimp (Lebbeus grandimanus) living with a Fernald Brooding Anemone (Cribrinopsis fernaldi), British Columbia, Canada

Norbert Wu / Fernald Brooding Anemone (Cribrinopsis fernaldi) stinging tentacles, southeast Alaska

Norbert Wu / Clown Shrimp (Lebbeus grandimanus) and Kincaid Coastal Shrimp (Heptacarpus kincaidi) among stinging tentacles of Fernald Brooding Anemone (Cribrinopsis fernaldi), southeast Alaska

Norbert Wu / Fernald Brooding Anemone (Cribrinopsis fernaldi) stinging tentacles, southeast Alaska

David Fleetham / Clown / Candy stripe shrimp (Lebbius grandimanus) on Rose / Crimson anemone (Cribrinopsis fernaldi) with eggs visible in the transparent tips of its tentacles, British Columbia, Canada.

David Fleetham / Clown shrimp (Lebbeus grandimanus) on Crimson / Rose anemone (Cribrinopsis fernaldi), British Columbia, Canada.

Norbert Wu / Clown Shrimp (Lebbeus grandimanus) among stinging tentacles of Fernald Brooding Anemone (Cribrinopsis fernaldi), Vancouver Island, British Columbia, Canada

Joel Sartore / Photo Ark / Crimson anemone (Cribrinopsis fernaldi) on white background, Indianapolis Zoo. Captive.

Shane Gross / Candy stripe shrimp (Lebbeus grandimanus) sheltering beneath tentacles of its host, Crimson anemone (Cribrinopsis fernaldi). Browning Pass, British Columbia, Canada. North East Pacific Ocean. July.

Shane Gross / Crimson anemone (Cribrinopsis fernaldi) mouth detail, Vancouver Island, British Columbia, Canada, Pacific Ocean.

Shane Gross / Crimson anemone (Cribrinopsis fernaldi) surrounded by red soft coral (Gersemia rubiformis) and yellow sponges, Vancouver Island, British Columbia, Canada, Pacific Ocean.

David Hall / Northern Basket Stars (Gorgonocephalus eucnemis) and Crimson Anemones (Cribrinopsis fernaldi), Baranof, Sitka, Alaska. August.

David Hall / Marine invertebrates including Crimson anemones (Cribrinopsis fernaldi), Painted anemones (Urticina crassicornis), Red soft coral (Gersemia rubriformis), Red sea urchins (Strongylocentrotus franciscan...

David Hall / Crimson anemone (Cribrinopsis fernaldi) Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.

David Hall / Crimson anemone (Cribrinopsis fernaldi) Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.

David Hall / Crimson anemone (Cribrinopsis fernaldi) with Candy-striped shrimps (Lebbeus grandimanus) living symbiotically. Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.