Arrow-head spider crab
Alternative names: Menatheius sp.
This crab lives in tropical waters throughout the world and is a semi-aggressive, nocturnal creatures. Its body is between 0.5 and 1 centimeters wide, while its leg span is of 20 centimeters.
It is either brown or green in colour and moves rather slowly. Its distinctive characteristic is the flat and triangular body with a sharp pointed tip between the eyes.