Bert Willaert / Hairy squat lobster (Lauriea siagiani) on giant barrel sponge. Bismarck Sea, Vitu Islands, West New Britain, Papua New Guinea

Tony Wu / Ortmann squat lobster (Chirostylus ortmanni) carrying a clutch of eggs, Kashiwajima, Japan.

Tony Wu / Ortmann squat lobster (Chirostylus ortmanni) carrying a clutch of eggs, Kashiwajima, Japan.

Nick Upton / Squat lobster (Galathea squamifera) hiding under a stone in a rockpool, threat display, Cornwall, England, UK, September.

Sue Daly / Spiny squat lobster (Galathea strigosa) climbing upside down in a hole, Sark, British Channel Islands, UK, September.

SCOTLAND: The Big Picture / Long clawed squat lobster (Munida rugosa) amongst small boulders covered in marine life, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

Tony Wu / Squat lobster (Allogalathea elegans) in a Sea crinoid, carrying a clutch of eggs, just visible under the crustacean's abdomen. Alexander's Wall, a dive site in the Eastern Fields of Papua New Guinea.

Pascal Kobeh / Squat lobster (Allogalathea elegans) living in a crinoid or feather star, Sulu Sea, Philippines

Christophe Courteau / Squat lobster (Galathea squamifera) dorsal view. Brittany, France, January.

Sue Daly / Spiny Squat Lobster (Galathea strigosa) St Abbs Voluntary Marine Reserve, Scotland (North Sea).

Sue Daly / Spiny Squat Lobster (Galathea strigosa) St Abbs Voluntary Marine Reserve, Scotland (North Sea).

Sue Daly / Spiny Squat Lobster (Galathea strigosa) St Abbs Voluntary Marine Reserve, Scotland (North Sea).