Are sperm whales extinct

The species displays a high degree of sexual dimorphism. Some species, including the western South Atlantic WSA humpback, may have recovered from the brink of extinction to their pre-whaling population , but several others are still endangered. Can be seen close to shore. Overview Threats. However, the species' greatest threats are ship collisions and entanglement in fishing nets. View Gallery 2 2.

Spermaceti was used in oil lamps, lubricants, and candles. Blue Sphere Media. Sperm Whale: Physeter macrocephalus. Holthuis and more recent discussions with relevant experts. Documents Document. The species was first described in by paleontologists Kiyoharu Hirota and Lawrence Barnes.

Primarily active at night, these tiny foxes live in underground dens and survive off of rodents, birds, lizards and other small animals like cottontails. More photos: Gorillas in Rwanda. The spermaceti organ is like a large barrel of spermaceti. Retrieved 10 August Retrieved 4 October