Article Nº 1888 Marine invertebrate Vol. II · p. 337
Jaca de pau (Grapsus minutus)
A small crab carried to Madeira by currents on floating timber and on the shells of sea turtles.
A brachyuran crustacean carried to this island by ocean currents, usually attached to wooden objects such as beams, casks, etc. It also lives on the shells of the turtles that come into Madeiran waters.