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

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.

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus), feeding on striped catshark (Poroderma africanum), False Bay, Cape Town, South Africa, July 2014

Doug Perrine / Leopard catshark (Poroderma pantherinum) endemic to South Africa. Non-exclusive. (Non-ex).

Cheryl-Samantha Owen / Pyjama shark (Poroderma africanum) curling into itself as a defensive, protective posture when thrown back into the sea. Kommetjie, Western Cape, South Africa.

Franco Banfi / Catshark egg (Scyliorhinus sp) on Red sea fan (Paramuricea clavata) Stupiste In dive site, Vis Island, Croatia, Adriatic Sea, Mediterranean

Alex Mustard / Coral catshark (Atelomycterus marmoratus) on coral reef at night, Triton Bay, West Papua, Indonesia. Tropical West Pacific Ocean.

Alex Mustard / Coral Catshark (Atelomycterus marmoratus) resting on the seabed at night. Lembeh Strait, Sulawesi, Indonesia. March

David Shale / Juvenile deep sea shark (Apristurus sp.) dorsal view, deep sea Atlantic ocean

Joel Sartore / Photo Ark / Studio shot of four juvenile small-spotted catsharks (Scyliorhinus canicula) resting on top of an egg case with embryo inside, the embryo moving causes the young to swim away, Vasco da Gama Aquarium....

Alex Mustard / Two lesser spotted catsharks (Scyliorhinus canicula) resting on the seabed in a channel between two islands. Shetland Islands, Scotland, British Isles. North East Atlantic Ocean.