Aral seal
The Aral seal (Pusa arida) is a species of earless seal endemic to the Aral Sea, located in Kazakhstan and Uzbekistan. Its closest relatives are the Baikal seal and Caspian seal, though groundbreaking genomic research indicates a somewhat recent hybridization event with the Ladoga ringed seal.
Description
The seals in the Aral Sea were likely not very different from their closest relatives up until the sea ran dry. After which, the population there experienced rapid speciation to survive the total lack of water. The most peculiar adaptation includes the seals' reduced corporeality. As less of their body mass is anchored in this dimension, they require much less food for much longer periods. A single errant trout could sustain an Aral seal for 4 years.
The body of an Aral seal contains only a single drop of blood. Their bone marrow instead produces a gaseous substance used for distraction, similar to ink in cephalopods. The fur of an Aral seal is not hydrophobic, making the Aral seal the most progressive earless seal. Mutations such as albinism and green coloration are common among the species.
Behavior
Aral seals are tricksters and cowards. They engage in maladaptive play behavior with humans they encounter, leading them towards promises of oasis that are nothing but a mirage...! Once they anger their target, they vanish in a puff of smoke to escape retaliation.
Baby Aral seals are much more defenseless and stupid than the adults. They often cry for no reason, likely because each baby carries with it a memory of the time when the sea was wet.
Diet
Aral seals mainly eat bacteria and aeroplankton. Their whiskers have adapted to filter feed through the air and dirt. They are still opportunistic, however, and will happily glut on any fish, small crustacean, or perfect pearl they find.
They have been known to cannibalize their offspring.
Conservation
The total number of living Aral seals is unknowable to modern science. However, due to a near total lack of predation, even from poaching, no one cries for them, so they're ok.