I’m actually surprised by how little people know about Lamna ditropis. They’re a mackerel shark found in the north Pacific, usually towards colder waters. Like the great white, they are slate grey in color on the top and pale white on the belly (with adults having large, dark splotches on their underbelly); also like the great white, they have the unique ability of homeothermy—the ability to maintain their own body temperature. Pretty neat and comes in handy when chasing their fast prey around—salmon (as in the common name), squid, sablefish and herring.
Like many sharks, they are also ovoviviparous, giving birth to anywhere from two to six pups.
Their birthing cycle seems to about around two years with gestation around nine months.
And yes, they practice oophagy as well. Gotta love intrauterine cannibalism.
They tend to be loners, but can sometimes be seen feeding in schools. They are known to habituate Prince William Sound during the annual salmon run (they really live up to their common name).
The salmon sharks to be in little danger, and therefore the IUCN has listed them as Least Concern (LC).
Did YOU know about this species of shark? If not, let us know below!
Have you met these sharks on a dive before? We'd love to hear about your encounter!