The tip of the rostrum is more rounded than that of the fin whale. The flippers are large, thin, rounded at the trailing edge, and pointed at the tips. Despite many protections including a moratorium on whaling since 1986, many species of cetaceans continue to be threatened – with some on the verge of extinction. Supporting Foundations, A Complete Guide to Whales, Dolphins And Porpoises, List of Species and Potential Sub-Species. killer whale – The killer whale can be seen traveling throughout the worlds major oceans, but they typically prefer cooler climates compared to the tropical climates found near the equator. Photo courtesy of Christin Khan from NOAA. The plates measure 31 in (78.7 cm) in length. In the summer months, sei whales do not move as far towards the polar waters as other rorqual whales and do not usually enter icy water. Number of sei whales has dropped for approximately 70% due to intense hunting of these whales in the past. There are over 80 species of cetaceans, a group made up of whales, dolphins and porpoises. Herding: They are usually observed alone or in pairs; groups of up to 50 have been observed where food is plentiful. Sei whales rise horizontally to the surface to breathe, exposing the dorsal fin and head simultaneously. , HomeBaleen WhalesBalaenopteridae IntroductionSei Whale, Family: Balaenopteridae Genus: Balaenoptera The sei whale, a somewhat mysterious type of whale that prefer to live in temperate waters in the mid-latitudes, was not yet mature, marine mammal biologists say. Sexual maturity is reached at 8 years when males are 43 ft (13 m) and females are 45 ft (13.7 m) long. Sei whale usually resides in temperate waters, away from the shore. The blow resembles and inverted cone, rarely taller than 15 ft (4.5 m). Breathing and Diving: They blow 2 to 3 times at approximately 17-second intervals before a 5 to 10 minute dive. This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. Sei whales favour temperate, deep offshore waters more so than other species of large whale, being rarely seen inshore. Length and Weight: Males may exceed 60 ft (18 m) in length and weigh 24 tons (22,000 kg); females may exceed 65 ft (20 m) and 26 tons (24,000 kg). Introduction to Sei Whale. Mating and Breeding: A 15 to 16 ft (4.5 to 5 m), 1 ton (900kg) calf is born after an 11 month gestation period. A 38-foot young male sei whale stranded … Feeding: Sei whales prefer euphausids and other small crustaceans, but also feed on capelin, pollack, anchovies, herring, cod, and sardines. Baleen Plates: There are 320 to 380 baleen plates on each side of the upper jaw with fine white bristles. The sei whale is an endangered species and its biggest threats currently are vessel strikes and entanglement. Natural History Notes: Sei whales are thought to live to at least 70 years of age. Color: Smooth dark gray on the dorsal and flank regions, and the posterior ventral region as well. Sei whales feed on euphausids and other crustaceans, which they catch while swimming on the surface, mouth open, skimming the water much as right whales do. These whales are the fastest swimming baleen whales, having been recorded reaching speeds of up to 25 kph (15 mph). Sei whales rise horizontally to the surface to breathe, exposing the dorsal fin and head simultaneously. Small white dorsal dots may be present on the dark lower ventral region. Distribution: They are found in all oceans but seem to avoid ice packs. Throat Grooves: Sei whales possess 38 to 56 throat grooves spaced about 3 in (7.5 cm) apart, extending down t he throat to between the flippers. One of the Baleen Whale species is the Sei Whale. Probably the fastest of all whales, the sei can reach speeds in excess of 24 mph (38 kph) which may assist them in capturing the small schooling fish on which they prefer to feed. Sei whales feed on euphausids and other crustaceans, which they catch while swimming on the surface, mouth open, skimming the water much as right whales do. Whaleopedia was developed with initial funding from VISA. This whale derived its name from “seje”, a Norwegian term for pollack, a member of the codfish family, because the whales appeared off Norway simultaneously with schools of the fish. No bottom-dwelling organisms are taken. The flippers and flukes are dark gray. The sei whale is a uniformly-colored whale with soft, swirling marks on its skin. Fins and Flukes: The falcate dorsal fin is very tall (10 to 24 in, or 25 to 61 cm) and situated farther back than that of the fin whale. Species: B. borealis Lesson, 1828. The chin, throat, and belly are white as far back as at least the end of the throat grooves. Physical Description: One long ridge runs from the tip of the upper jaw to the blowholes. To feed, skim-feeders swim with an open mouth, filling it with water and prey. Sei whale definition is - a widely distributed dark gray baleen whale (Balaenoptera borealis) that has a ridge on the top of the head and may reach a length of nearly 60 feet (18 meters) —called also sei. The fin whale is the second largest animal to ever live, in the entire history of Earth. Learn more about whales and dolphins and what we can do to protect them. Like other great whales, they prefer to spend the summer feeding in cooler waters before migrating to …
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