Sturgeons are weird creatures. These girls are the ones who make caviar – and to whom it really belongs.
Sturgeons used to be everywhere: from the English channel to the Mediterranean, and from the Black Sea all the way throughout Siberia. Unfortunately, because catching one provides food to many, they have been fished to near-extinction.
The species of sturgeon that once swam in the Baltic Sea disappeared some 100 years ago. These days the only sturgeons out there are the Russian species which are from time to time farmed and let out into the waterways – and I have not heard of anyone catching one in a net, ever.
Curiously, these scary-looking fish lack teeth (except for the beluga sturgeon and another near-related species), and they do not use their eyes when they look for food or eat. Instead they have a good sense of smell, extended to a lot of chemical cues, and they sense weak electric signals from other living things nearby.
The Maretarium in Kotka specializes in fish found in Finnish waters – thus a lot of trout, perch, a few funny-looking pikes, and a bunch of funky eels. Even in cold Finland, where waters freeze over in the winter, there is so much going on underneath the bellies of bathing-suited summer lovers just skimming the surface of the water.
(Maretarium, Kotka, Finland; July 2020)