While the Baltic Sea might seem boring and mundane compared to tropical oceans, it has a fairly diverse and very odd assemblage of fish. It’s the world’s largest pool of brackish water, but it’s geologically so young, there are no specialized brackish water species.
So it’s a confusing mix. There are resilient ocean species, often smaller than their oceanic counterparts and unable to breed in some parts of the sea, and just as resilient freshwater fish venturing into the salty parts. Arctic fish mixed with temperate species coming from south. Oceanic fish that once invaded fresh waters and then returned here, now unable to tolerate full ocean salinity.
Fish that give birth, fish whose males get pregnant, fish whose eyes migrate over their heads during their lifetimes, fish that build nests, fish that smell like fresh cucumber. We have everything.
Made for Sieppo, a children’s magazine published by The Finnish Association for Nature Conservation.
I drew these Jellyfish as a gift for a friend, who is looking to get a tattoo sleeve. I wanted to capture their ghostlike quality, the beautiful lace-like details of their parts, and movement, while composing a piece to be used on a human canvas. They were a lot of intense fun! I have more drawings and other works here: www.evabialecki.com
Sharks exposed to ocean water acidified by too much carbon dioxide alter their behavior, swimming in longer spurts than sharks in typical ocean water, particularly during their nighttime wanderings. More
Adding just a few polymers to a liquid can substantially change its behavior. The presence of polymers turns otherwise Newtonian fluids like water into viscoelastic fluids. When deformed, viscoelastic fluids have a response that is part viscous—like other fluids—and part elastic—like a rubber band that regains its initial shape. The collage above shows what happens to a thinning column of a viscoelastic fluid. Instead of breaking into a stream of droplets, the liquid forms drop connected with a thin filament, like beads on a string. In a Newtonian fluid, surface tension would tend to break off the drops at their narrowest point, but stretching the polymers in the viscoelastic fluid provides just enough normal stress to keep the filament intact. If the effect looks familiar, it may be because you’ve seen it in the mirror. Human saliva is a viscoelastic liquid! (Image credit: A. Wagner et al.)