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

Alex Mustard / 2020VISION / Fireworks anemone (Pachycerianthus multiplicatus) extends out of the muddy seabed in the calm waters of the upper reaches of a Scottish sea loch. Loch Duich, Ross and Cromarty, Scotland, UK, April

Norbert Wu / Tube-dwelling Anemone (Pachycerianthus fimbriatus) group, Monterey, California

Norbert Wu / Giant Nudibranch (Dendronotus iris) attacking Tube-dwelling Anemone (Pachycerianthus fimbriatus) eating tentacles, Monterey, California, sequence 3 of 3

Norbert Wu / Giant Nudibranch (Dendronotus iris) attacking Tube-dwelling Anemone (Pachycerianthus fimbriatus) eating tentacles, Monterey, California, sequence 2 of 3

Norbert Wu / Giant Nudibranch (Dendronotus iris) attacking Tube-dwelling Anemone (Pachycerianthus fimbriatus) eating tentacles, Monterey, California, sequence 1 of 3

Fred Bavendam / Giant Nudibranch (Dendronotus iris) attacking a Tube-dwelling Anemone (Pachycerianthus fimbriatus), Vancouver Island, British Columbia, Canada. Sequence 3 of 5

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