Why are flounder funny looking?

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The other day, I was asked a simple question that I knew the answer to, right off the top of my head, and since I’m nothing but lazy and lovin’ the easy stuff, I thought I’d expand on it a bit here. The question was, “How do flounder get to be that way, with their eyes all on one side of the head?” And the answer is…pedantic and longwinded, but not too difficult.

The Pleuronectiformes, or flatfish, are a successful teleost order with about 500 known species, some of which are important commercially and are very tasty. The key to their success is their asymmetry: adults are camouflaged ambush predators who lurk on the sea bottom, taking advantage of their flat shape to rest cryptically and snap up small organisms that wander nearby. They lie on their sides, and have peculiarly lop-sided heads in which one eye has drifted to the other side, so both eyes are peering out from either the left or right side (which side is consistent and characteristic for a particular species, although there is at least one species with random assignment of handedness to individuals, and mutant strains are known in others that reverse the handedness.)

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Signs of the Cephalopod Underground

A reader discovered this fascinating graffiti in downtown Minneapolis, near the transit center on Hennepin Avenue.

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In Minneapolis! So far from the sea, but I’m not alone in pining for it.

I may have to look this up. This is a travel week for me, as I have to run around taking care of some essential pre-school year duties—I’m actually sitting in the St Cloud mall right now, watching the senior citizens do their laps, while waiting for our car to get some minor repairs and maintenance—and tomorrow I have to run in to the university to attend a meeting and to the airport to dispose of one of my kids for a few weeks. I might have some time to cruise the squid-haunted streets of the Big City for a while.