The underwater fauna still has many surprises in store for the scientific community. In zoology, a discipline devoted to the scientific study of animals, there is a little-known biological phenomenon: abyssal gigantism. The latter stipulates that in the abyss of the oceans, crustaceans and other invertebrates are much larger in size than those of the same species living on the surface. This phenomenon has been studied since 1880. The main hypothesis put forward to explain this difference in size would be linked to the temperature of the environment. For example, Alicella gigantea, a giant crustacean from the abyss, measures, on average, 34 cm, against a maximum of 3 cm for its surface counterparts.