I'd never thought I'd think about the sleeping habits of fish, but I've started noticing what they do, and I thought it was just generally pretty interesting.
My guppies hang around at the top of the water, or sink down and I swear, almost cuddle into the gravel at the bottom of the tank; they're so adorable it's riduculous. My beta also tends to wedge himself by the fake plants so the filter current doesn't sweep him away. I think my cory never sleeps; he's always hyperactive. My neon tetras also lost their bright colors at night (makes sense since there's no light to see by anyway, so why waste the energy
?), until they 'woke up' and became active when I turned on the light suddenly.
Does anyone else's fish do interesting things when it's nighttime, or when they're 'sleeping'?
Speaking of fish and nighttime, I saw 3 "franken fish" in my local store and they seemed to glow bright green in the dark fish-room. I couldn't tell if they were glowing in the dark literally, or merely flourescing. I think they're pretty neat (though expensive for such small fish: $15 each). I read about ornamental flourescing zebra danios, but these weren't the same thing. Has anyone else seen these around, or actually bought any?