All items sold on this website are polyurethane resin replicas, made in USA. No real or natural bone is available on this site.
Lissodelphis borealis Skull Replica measures 17.7 inches. Lissodelphis borealis Skull is museum quality polyurethane cast. Made in USA. Cast of California Academy of Sciences Specimen. 2-part skull (separate cranium and jaw). Known as Northern Right Whale Dolphin.
The Lissodelphis borealis is a small, slender and finless species of cetacean found in cold temperate waters of the North Pacific Ocean.
These cetaceans are predominantly black, white beneath, and some of the few without a dorsal fin or ridge. They are smaller members of the delphinid family, oceanic dolphins, and very slender.
Capensis Dolphin skull has a short, well-defined beak, a straight mouthline and 37 to 54 pairs of thin, small, sharp cone-shaped teeth in each jaw which are not externally visible. The skull is made up of a seperate cranium and jaw.
Their gestation perioed is estimated at over 12.1 to 12.3 months. Calving appears to peak in July and August. Size of the calves is approximately 39.5 to 40.8 inches at birth. Calves get their adult coloration when they are about one year old. Before this, they are a paler version of the adults, and are mostly brown, grey or cream.
The Lissodelphis borealis is widely distributed in the temperate North Pacific in a band running from Kamchatka and mainland Japan in the west to British Columbia down to the Baja California Peninsula in the east.
It is not known with certainty if they follow a migratory pattern. However, individuals have been observed close to the Californian shore following their main food source, squid, in winter and spring.
They move in pods of several hundred individuals and sometimes congregate in groups of 3000. The groups may also contain Dusky dolphins and Pilot whales (in the south) and Pacific white-sided dolphins (in the north).
These dolphins are some of the fastest swimmers (in excess of 40 km/h). Lissodelphis borealis can become very boisterous and breach and tail-slap or become very quiet and almost undetectable at sea.
At high speed they can leap up to 7 meters across the ocean’s surface in a graceful bouncing motion.
Unlike most delphinidae, Lissodelphis borealis vocalise without the use of whistles. Visual and audio surveys have confirmed that vocalisation primarily consists of clicks and burst pulses.
L. borealis have repetitive burst-pattern pulses that can be categorised and associated to different subgroups of L. borealis.
These vocalisations may be used in the communication between individuals, in a similar way to signature whistles in other delphinid species.
