Gary Bell/ Oceanwide / Sea Goldie (Pseudanthias squamipinnis) school in coral reef with feather stars, Great Barrier Reef, Queensland, Australia

Alex Mustard / Plumose anemones (Metridium senile) and common starfish (Asterias rubens) beneath the sun in a Norwegian Fjord. Gulen, Bergen, Norway. North East Atlantic Ocean.

Sue Daly / Red sea star (Echinaster sepositus) and bryozoans fauna. Channel Islands, UK July. Highly commended, 'Habitat' category, British Wildlife Photography Awards (BWPA) competition 2012.

Juergen Freund / Blue sea star on massive Boulder coral (Gardineroseris planulata) North Sulawesi, Indonesia. This coral species is normally found from the Red Sea to Central America, and is relatively uncommon in the...

Juergen Freund / Star shaped Pincushion / Pillow cushion starfish (Culcita novaeguinea), detail of the underbelly. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Friant's sea star (Nardoa frianti), close-up of skin of the upper side. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / A small Necklace sea star (Fromia monilis) on larger Blue sea star (Linckia laevigata) Sipadan, Malaysia

Sue Daly / Large group of Sunflower sea stars (Asterias / Pycnopodia helianthoides) covering rock, pacific coast, Canada, August

Georgette Douwma / False fire urchin (Astropyga radiata) grouped on sandy bottom. Lembeh Strait, North Sulawesi, Indonesia.

Fred Bavendam / Red Biscuit Star (Pentagonaster dubeni), Jervis Bay, New South Wales, Australia

Flip Nicklin / Sea Star, Anemones and Coralline Algae living 40 feet below the water surface, Admiralty Inlet, Lancaster Sound, Nunavut, Canada

Pascal Kobeh / Reef covered with Clams (Mesodesma arctatum) and Common starfish (Asterias rubens) Gulf of Saint Lawrence, Canada