flounder

A flounder is a type of flatfish that lives underwater. It's a bit awkward-looking, with both eyes on one side of its head.

You might hear people say "I floundered" when they mean they struggled or had trouble doing something, like learning a new skill or getting through a difficult situation. This use of the word comes from how flatfish move around in the water - they sort of thrash about and stumble along until they get their balance back. If someone says they floundered at work this week, it means they felt overwhelmed and didn't know what to do, but hopefully they'll be able to find their footing again soon.