The Journal of Experimental Biology. The left passage runs alongside the spermaceti organ and goes directly to the blowhole, whilst the right passage runs underneath the spermaceti organ and passes air through a pair of phonic lips and into the distal sac at the very front of the nose. Matrilineal groups are the basic unit of social organisation in Sperm Whales, and consist of whales from several generations. Sperm Whale Physeter macrocephalus Linnaeus, There should be consideration to pool existing sightings and strandings data to locate possible concentration areas. Obtain information on Sperm Whale diet to assess any possible impact of the fishing industry on Odontocete food resources, especially for species such as deep-sea cephalopods. Prime-aged bulls, in their late 20s and older, rove among groups of females on the tropical breeding grounds looking for mating opportunities.
Humpback, sperm, right whale numbers, shark deaths in WA
Like other toothed whales, the sperm whale can retract and protrude its eyes thanks to a 2-cm-thick retractor muscle attached around the eye at the equator,  but are unable to roll the eyes in their sockets. They eat venomous snakes and ticks, gobbling up to insects a week. Pygmy sperm whale K. When threatened, the hagfish emit a slime from their pores that, when mixed with water, expands into a gelatinous goo that can either trap predators or suffocate them by clogging their gills.
The sperm whale's cerebrum is the largest in all mammalia, both in absolute and relative terms. The first secretes no gastric juices and has very thick muscular walls to crush the food since whales cannot chew and resist the claw and sucker attacks of swallowed squid. Fishermen do not target the creatures sperm whales eat,  but long-line fishing operations in the Gulf of Alaska have complained about sperm whales stealing fish from their lines. Rudimentary teeth are also present in the upper jaw, but these rarely emerge into the mouth. Sperm whale watchers often use hydrophones to listen to the clicks of the whales and locate them before they surface.
It has been hypothesised that it can stun prey with its clicks. Fossil sperm whales differ from modern sperm whales in tooth count and the shape of the face and jaws. Teeth Another synonym australasianus " Australasian " was applied to sperm whales in the southern hemisphere. Sowerby's beaked whale M. Marine bioregional plans have been developed for four of Australia's marine regions - South-west, North-west, North and Temperate East. Matrilineal groups are the basic unit of social organisation in Sperm Whales, and consist of whales from several generations. Fossil sperm whales from the Middle Miocene include Aulophyseter , Idiorophus and Orycterocetus , all of which were found on the west coast of the United States , and Scaldicetus , found in Europe and Japan.