Solvin Zankl / Kelp membranipora bryazoan (Membranipora isabelleana) Comau Fjord, Chile, January.

Alex Mustard / Nudibranch (Adalaria jannae) with egg masses laid on the bryozoan (Membranipora sp.), which is growing on a kelp frond. Browning Pass, Vancouver Island, British Columbia, Canada. North East Pacific Oc...

Joel Sartore / Photo Ark / Wool bryozoan (Amathia convoluta) on white background, Gulf Specimen Marine Lab and Aquarium.

Joel Sartore / Photo Ark / Wool bryozoan (Amathia convoluta) on black background, Gulf Specimen Marine Lab and Aquarium.

David Hall / Clown nudibranch (Triopha catalinae) grazing on Lace bryozoans (Membranipora serrilamella) surrounded by several caprellid amphipods, also known as 'skeleton shrimps' (Caprella sp.); Gambier B...

David Hall / Proliferating anemones (Epiactis prolifera) and Kelp lace bryozoans (Membranipora serrilamella) on Bull kelp (Nereocystis luetkeana), Browning Pass, Queen Charlotte Strait, British Columbia, Canada. S...