Risso’s dolphin | Grampo
Features: at the birth the livery is grey, but growing up, it is covered by numerous scars which, with increasing age, cover the whole body till when it assumes a white colouration, in particular in the part of the head. The head is bulbous with a V-shaped groove in the centre, and ends with a very small rostrum. It is endowed with 2-7 teeth present only in the lower jaw which serve only to hold the food. The dorsal fin is high and falcate and also recognizable by the presence of scars and scratches, which allow to identify each specimen.
Max Lenght: 4 m
Max Weight: 500-600 kg
Longevity: around 40yrs
Dive Time: 1-10 min
Dive Depth: – 300 m; max ever recorded – 460 m.
Velocità massima: 30 km/h (ma in generale predilige un nuoto lento 7 km/h)
Food Diet: mainly cephalopods
Classificazione IUCN-Red list: LC (Least concern ). DD (Data Deficient. Mediterranean population)
Threats: noise pollution, intensive fishing.