Azores : bico de garrafa - POR : Baleia de bico de Blainville - GB : Blainville's beaked whale – FR : Baleine à bec de Blainville - NEDER : Spitssnuitdolfijn van de Blainville - D : Blainville-Zweizahnwal
Blainville's Beaked Whale (Mesoplodon densirostris), or the Dense-beaked Whale, is the widest ranging mesoplodont whale and perhaps the most documented. The name "densirostris" is a latinized form of "dense beak".
The body of Blainville's Beaked Whale is robust, but also somewhat compressed laterally compared with other Mesoplodonts. The males have a highly distinctive appearance, the jaws overarch the rostrum, like a handful of other species, but does it towards the beginning of the mandible and then sloped down into a moderately long beak. Before the jaw sloped down, a forewords facing, barnacle infested tooth is present. One of the more remarkable features of the whale is the extremely dense bones in the rostrum (hence the name), which are most likely a form of protection again aggression from other males. The melon of the whale is flat and hardly noticeable. Coloration is dark blue/gray on top and lighter gray on the bottom, and the head is normally brownish. Males have scars and cookie cutter shark bites typical of the genus. Males reach at least 4.4 meters (14 ft 6 in) and 800 kg (1800 pounds), whereas females reach at least 4.6 meters (15') and 1 tonne (2200 pounds). Juveniles are 1.9 meters long (6 ft 4 in) when born and weigh 60 kg (130 lb).
Espaço Talassa team has observed this species for the first time in 2007 : July, 27th (6 miles south of Lajes do Pico), August, 10th (6 miles south of Lajes do Pico) and finally October, 3rd (2 miles southwest of Lajes do Pico)