OK, so I was lazy and ineffective (at blogging) last Friday. So here's the Friday fish: the red-tail shark, which isn't actually a shark at all (it's a teleost).
I had one of these when I was a child, it did well in a smallish tank with a plecostomus. In my experience, these sharks tend to be a bit more active and interesting to watch than many other aquarium fishes.
I did a Web of Science search for "labeo bicolor" and got only two hits - from 1989 and 1990. I guess these guys are not model organisms for anything. Oh well, I like the way they look - when healthy, they are very striking, completely black with a bright red tail.
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