Fred Bavendam / Giant Nudibranch (Dendronotus iris) attacking a Tube-dwelling Anemone (Pachycerianthus fimbriatus), Vancouver Island, British Columbia, Canada. Sequence 4 of 5

Pascal Kobeh / Nudibranch / sea slug giant doris (Hypselodoris picta), Canary Islands

Pascal Kobeh / Giant doris nudibranch (Hypselodoris picta) on the sandy bottom, Canary Islands

Franco Banfi / Orange peel nudibranch (Tochuina tetraquetra), Alaska, United States, North Pacific Ocean.

Franco Banfi / Giant dendronotid nudibranch (Dendronotus iris) Vancouver Island, British Columbia, Canada, Pacific Ocean

Franco Banfi / Giant nudibranch (Dendronotus iris) Vancouver Island, British Columbia, Canada, Pacific Ocean

Pascal Kobeh / Orange peel nudibranch (Tochuina tetraquetra), Alaska, USA, Gulf of Alaska. Pacific ocean.

Fred Bavendam / Giant Nudibranch (Dendronotus iris) attacking a Tube-dwelling Anemone (Pachycerianthus fimbriatus), Vancouver Island, British Columbia, Canada

Alex Mustard / Detail of the sensory rhinophore of an Orange peel nudibranch (Tochuina tetraquetra). Browning Pass, Vancouver Island, British Columbia, Canada. North East Pacific Ocean.

Jeff Rotman / Giant Dendronotid Nudibranch (Dendronotus iris) swimming at night, Vancouver Island, British Columbia, Canada, North Pacific Ocean

Jeff Rotman / Giant Dendronotid Nudibranch (Dendronotus iris) close up detail, Vancouver Island, British Columbia, Canada, North Pacific Ocean

Jeff Rotman / Giant Red Dendronotid Nudibranch (Dendronotus rufus) swimming below surface, Vancouver Island, British Columbia, Canada, North Pacific Ocean