Australian dolphin experts and enthusiasts are baffled by a terrible skin condition that recently appeared on two bottlenose dolphins. The cow/calf pair, named Wave and Tallula, are well known locally and inhabit the Port River Estuary near Adelaide. Photos of the severe skin problem were sent to marine mammal experts around the world, but no… [read more]
Shark-toothed dolphin and other fossil curiosities
Ah yes Squalodon, a genus of shark-toothed dolphins that lived 20 million years ago and is now extinct. This is probably a good thing, a dolphin just wouldn’t be a dolphin if it had shark teeth. That just doesn’t seem right. Although shark teeth may have helped them avoid captivity down the road… According to the Encyclopedia… [read more]
Dead gray whale ate sweat pants for lunch
I have heard many stories about the devastating impacts of pollution, how fishing gear entangles and strangles marine mammals, how bits of plastic end up in birds’ stomachs, and how plastic bags are mistaken for jellyfish by turtles. But sweat pants in a gray whale’s stomach?! That is a first. And unfortunately won’t be the… [read more]
Very cool baleen whale fossil
Well I have to say reading the article on the cetacean fossil record in the Encyclopedia of Marine Mammals really challenged my attention span a few times. But sticking with it paid off when I happened upon the part about the Llanocetus denticrenatus. This is the name given to a very unique 35 million year… [read more]
Cetacean fossil record: whale and dolphin bones
When it comes to figuring out the ancient history of whales and dolphins, all we really have is their bones. Sometimes whole skeletons have been found, but more often it’s pieces or sections of bone here and there that provide clues to a larger puzzle. Most whale and dolphin fossils are found in sedimentary rock,… [read more]
Whales and dolphins have lived through some crazy times
In the last two million years, the earth has gone through many changes. Yet, many whales and dolphins have managed to survive it all. I’m talking ice ages, sea level rise, dramatic shifting of land masses and coastlines. Although, it does seem like it would be easier for fully aquatic animals to adjust to shifting… [read more]
Evolution mimicry: look like a shark to trick others
Mimicry is a cool evolutionary strategy that pygmy and dwarf sperm whales have used to get through life with fewer predator attacks. These two marine mammals have incorporated some of the standard characteristics of sharks to scare off other animals that may have considered them possible dinner options. According to the Encyclopedia of Marine Mammals,… [read more]
Cetacean evolution: whale and dolphin ancient history
For obvious reasons it’s tough to find good photos or drawings of long gone ancient whales and dolphins, so instead I am using a drawing of several of today’s modern whales for this post. Scientists have concluded that whales, dolphins and porpoises have evolved from Archaeocetes, the name given to a group of ancient whales.… [read more]
Cetacean communities and coexistence
How do whales, dolphins and porpoises all get along and share their ocean home? This question is another one scientists hope to answer through the study of cetacean ecology. Possibly they make pacts with each other and agree to go after different prey and stay in certain locations to prevent fighting over resources and bad… [read more]
4 main types of cetacean prey
1. The first types of prey that many cetaceans prefer are tiny critters that form large schools closer to the surface. This includes several types of crustaceans (krill) and small fish (sardines, anchovies). And ironically enough, the largest whales prefer this type of dinner and have a built-in filter system called baleen that allows them… [read more]
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