Nick Upton / Stalked jellyfish (Lucernariopsis campanulata), a BAP protected species, clinging to seaweed in a rockpool, near Falmouth, Cornwall, UK, September.

Alex Mustard / Clinging jellyfish (Conionemus vertens) swimming in open water. The orange structures are reproductive organs. This species gets its name because it is able to cling to seagrass and algae. Browning Pa...

Alex Mustard / Clinging jellyfish (Gonionemus vertens) swimming in mid-water, Browning Pass, Vancouver Island, British Columbia, Canada, Queen Charlotte Strait, Pacific Ocean.

Shane Gross / Three Amphipods (Hyperiidae sp.) clinging to a jellyfish, Vancouver Island, British Columbia, Canada, Pacific Ocean.

Shane Gross / Amphipods (Hyperiidae sp.) clinging to a jellyfish, Vancouver Island, British Columbia, Canada, Pacific Ocean.

Shane Gross / Clinging jellyfish (Gonionemus vertens) sticking to Eelgrass (Zostera marina), Prince William Sound, Alaska, USA, Pacific Ocean.

Alex Mustard / Dense growth of Bootlace seaweed (Chorda filum) in shallow water, with a Stalked jellyfish (Calvadosia sp). clinging on between strands, Kimmeridge, Dorset, England, UK, English Channel. July.

Hiroya Minakuchi / Clinging Jellyfish (Gonionemus vertens), Japan

Hiroya Minakuchi / Clinging Jellyfish (Gonionemus vertens), Japan