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The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body. A cosmopolitan species, it is found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.
Epulonipiscium species type B life cycle. [8] The largest Epulonipiscium morphologies exhibit a unique viviparous reproduction. This unusual and derived form of sporulation produces anywhere from one to twelve daughter cells that grow inside of the parent cell, until the parent eventually lyses, and dies.
Orca hunting a Weddell seal. The orca is known to prey on numerous other toothed whale species. One example is the false killer whale. [69] To subdue and kill whales, orcas continually ram them with their heads; this can sometimes kill bowhead whales, or severely injure them. Other times, they corral their prey before striking.
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The most common natural predator of sperm whales is the orca (killer whale), but pilot whales and false killer whales sometimes harass them. [193] [194] Orcas prey on target groups of females with young, usually making an effort to extract and kill a calf. The females will protect their calves or an injured adult by encircling them.
The 100 species with longest life-spans recorded and verified [1] This is a list of the longest-living biological organisms: the individual(s) (or in some instances, clones) of a species with the longest natural maximum life spans. For a given species, such a designation may include:
In biology, a biological life cycle (or just life cycle when the biological context is clear) is a series of stages of the life of an organism, that begins as a zygote, often in an egg, and concludes as an adult that reproduces, producing an offspring in the form of a new zygote which then itself goes through the same series of stages, the ...
After a legal battle, all orca captures in Washington came to an end. While orca captures in BC came to an end a year later in 1977, [26] captures in other areas such as Iceland continued well into the 1980s. Orca behavior and social life in the Salish Sea came to the public eye in the early 1970s with the works of Mike Bigg.