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The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
The narwhal is a stocky cetacean with a relatively blunt snout, a large melon, and a shallow ridge in place of a dorsal fin. Males of this species have a large (1.5–3.0 m (4 ft 11 in – 9 ft 10 in)) long tusk, which is a protruding left canine thought to function as a weapon, a tool for feeding, in attracting mates or sensing water salinity.
Cetaceans are famous for their high intelligence, complex social behaviour, and the enormous size of some of the group's members. For example, the blue whale reaches a maximum confirmed length of 29.9 meters (98 feet) and a weight of 173 tonnes (190 short tons), making it the largest animal ever known to have existed. [5] [6] [7]
Whales are a part of the cetacean family, which is divided into two groups: baleen whales (which don't have teeth) and toothed whales. These animals are found in every ocean , but this doesn't ...
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the
Dawn the humpback whale in the Sacramento River in 2007 Cetaceans are the animals commonly known as whales , dolphins , and porpoises . This list includes individuals from real life or fiction, where fictional individuals are indicated by their source.
The sei whale, or Rudolph's whale (Balaenoptera borealis), lives mainly in the North Atlantic and avoids enclosed seas, [22] but occasionally makes occasional incursions into the Mediterranean, although this is considered exceptional [12] and restricted to Spain and France. [14] The sei whale is classified as "endangered" on the IUCN Red List. [23]
Both species are relatively small whales, 3–5 m (9.8–16.4 ft) in length, with a forehead melon, and a short or absent snout. Premaxillary teeth are absent. [1] They do not have a true dorsal fin, but do have a narrow ridge running along the back, which is much more pronounced in the narwhal.