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Tripneustes ventricosus, commonly called the West Indian sea egg or white sea urchin, is a species of sea urchin. It is common in the Caribbean Sea , the Bahamas and Florida and may be found at depths of less than 10 metres (33 ft).
A30 Tsitika [6] (1947-2012), born around 1947, Tsitika was one of the oldest killer whales in the northern resident community and one of the few orcas that was already a reproductive mother when first seen in the early 1970s. She was very recognizable due to the distinctive curve of her dorsal fin.
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 inhabits a wide range of marine environments, from Arctic to Antarctic regions to tropical seas.
A fertilized animal later releases a gelatinous egg mass, and the eggs float freely until hatching. Their embryonic shells are lost within the first few days after hatching. The gymnosomes, like other shell-less opisthobranchs, [ a ] discard their shells at metamorphosis, with the retractor muscles being severed and the shell lost. [ 10 ]
"Killer whales can easily travel 25 miles an hour," she said. "To punch a hole in the side of a dolphin and hit it so hard that it's jumping so high out of the water — the force is tremendous."
The IUCN reported in 2008, "The taxonomy of this genus is clearly in need of review, and it is likely that O. orca will be split into a number of different species or at least subspecies over the next few years." [3] However, large variation in the ecological distinctiveness of different orca groups complicate simple differentiation into types. [4]
An orca who made headlines for mourning her dead calf in a unique two-week “tour of grief” is responding to her latest deceased newborn in the same way, a heart-wrenching photo shows ...
The genus Orcinus was published by Leopold Fitzinger in 1860, [4] its type species is the orca named by Linnaeus in 1758 as Delphinus orca.Taxonomic arrangements of delphinids published by workers before and after Fitzinger, such as John Edward Gray as Orca in 1846 and Orca (Gladiator) in 1870, are recognized as synonyms of Orcinus.