Category: cetacean

the-cetacean: Common Dolphins (Dolphins: Spy …


Common Dolphins (Dolphins: Spy in the Pod)

Russia to ban capture of killer whales and bel…

Russia to ban capture of killer whales and belugas in 2019 – Whale prison in Russia:


Wonderful news. Let’s hope this is reinforced.

Protecting Adult Females Key to Population Gro…


Tripelago (#2614), a 21 year old North Atlantic right whale, with her
4th calf off the coast of Fernandina Beach, Florida on February 2, 2017. Her calf was one of only five that were born in 2017.
credit: Georgia DNR under NOAA permit #15488-02

A new report has been released by the Northeast Fisheries Science Center
stating that protecting adult females is the most important thing to do
for the survival of North Atlantic right whales. This is already well
known as we know that there are most likely less than 100 females of
breeding age in the population of only around 408 and they have not only
struggled to reproduce, they have struggled to survive. Still, it is
good that this new report can be referenced when making decisions
regarding North Atlantic right whales and that it further underscores
the need to protect these whales.

lifeunderthewaves: Humpbacks by willyam My Po…


Humpbacks by willyam My Pond5 portfolio

My whales photos on ShutterStock

Humpback whales Mother and Calf and an escort in Pacific ocean underwater


whaletalesorg: Sunset with Humpbacks! To read…


Sunset with Humpbacks! To read this story (and more!), follow the link in our bio.⠀
Photo by @whalebreathphotography⠀
#whaletales #whales #humpback #sunset #getonaboat #whalewatching #whalesareawesome #whalesofinstagram #storytelling



Check out that difference in dorsal fin size—an adult male killer whale’s dorsal fin can be up to 6 feet in height, while a female’s dorsal fin be half as tall at around 3 feet.

Surprisingly, we still do not know why this difference in fin size exists. Sexual selection is probably involved—females prefer to mate with large males over smaller ones. But is the tall dorsal fin a byproduct of increasing selection for larger overall body size? Or are females specifically choosing taller dorsal fins? If so, are there beneficial genes associated with a larger dorsal fin that a female might want for her offspring?

On the other hand, perhaps sexual selection isn’t involved at all—sexual dimorphism can be caused by differences in behavior or ecology among the sexes in species. Dorsal fins are used for balance, and in marine mammals, they are also used for thermoregulation. Any differences in behaviors or ecology relating to these factors in males and females could potentially drive changes in fin morphology.

Even seemingly simple questions like “Why is a male killer whale’s dorsal fin larger than a female’s?” can be surprisingly challenging to answer!



I am roughly 5 feet and 6 inches in height (~167 cm). If I stood on this male killer whale’s back, his dorsal fin would be taller than I am. Their size is often hard to grasp; even when you see them in person, it’s still difficult to gauge how large they are until they make close approaches. Even after dozens of hours spent in their presence, I am still humbled by their size.



Possible coloration options for the extinct Acrophyster Deinodon from the Miocene era. The two last options are the most likely, as they look more like some of the whale colorations of today. These illustrations where made in collaboration with Olivier Lambert of the royal museum of natural history in Brussels.

cetuselena: CA140B2 & CA140C. 4/18


CA140B2 & CA140C.


keiko-conservation:Video of the day is this IN…


Video of the day is this INCREDIBLE shot from @cascadiaresearch of a false killer whale hunting a mahi mahi. Shot by @uheheu under NOAA Permit.⠀
“This is just a teaser- if you want to see the longer clip, including the cameo of the Oceanic Whitetip Shark investigating the scene, check out our project page! (linked in @cascadiaresearch bio)“⠀
#falsekillerwhale #cascadiaresearch #justiceforkina