Ralph Pace / Swell Shark (Cephaloscyllium ventriosum) egg case and embryo, Monterey, California

Jordi Chias / Spotted catshark (Scyliorhinus canicula) just hatched from egg case that is on Seafan (Paramuricea clavata), Ullastres seamount, Costa Brava, Llafranch, Catalunya, Spain

Alex Mustard / Draughtsboard Shark / Australian Swellshark (Cephaloscyllium laticeps) swims through a giant kelp forest (Macrocystis pyrifera). Like a pufferfish, this species of shark is able to rapidly swell with...

Heidi & Hans-Juergen Koch / Greater Spotted Dogfish (Scyliorhinus stellaris) embryo in mermaid's purse egg capsule, native to Atlantic and Mediterranean

Sue Daly / Nursehound (Scyliorhinus stellaris) Sark, British Channel Islands, August.

Sue Daly / Smallspotted catshark (Scyliorhinus canicula) Isle of Man, July.

Sue Daly / Small-spotted catshark (Scyliorhinus canicula) , Mid shot, resting on the seabed, Sark, British Channel Islands, UK, July.

Sue Daly / Small-spotted catshark (Scyliorhinus canicula) swimming away, Sark, British Channel Islands, UK, July.

SCOTLAND: The Big Picture / Cat shark egg attached to seaweed and animal turf on sea floor, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Small spotted catshark (Scyliorhinus canicula) on a maerl bed, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Fisherman holding two Catsharks as bycatch from a lobster pot, Lamlash Bay, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Lesser spotted catshark / Dogfish shark (Scyliorhinus canicula) on a maerl bed in no take zone, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.