Geryon trispinosus is a species of crab that lives in deep water in the north-eastern Atlantic Ocean.

Geryon trispinosus is a small crab, reaching a carapace length of up to 40 millimetres (1.6 in).

Its range extends from Norway in the north to the Bay of Biscay in the south,[3] and also includes the Canary Islands.

Due to the shallow slopes in the north-eastern Atlantic, these migrations involve distances of 20–50 kilometres (12–31 mi).

Another squat lobster, M. tenuimana, lives at greater depths, but in much lower numbers, and therefore does not impact the survival of G. trispinosus as severely.