Otocinclus hyper active in the morning

[krabbie]

I notice that every morning when I switched on the light, my OTO will be swimming fanatically ... is it b'cos it's startled by me? It will continue the crazy swimming for a couple of minutes ... quite long, right?

[Quixotic]

Nothing to worry, probably a combination of getting startled by the turning on of the lights, and getting his/her engine started for the day.

http://en.wikipedia.org/wiki/Otocinclus

Otocinclus species are diurnal and generally found in small streams or along the margins of larger rivers, clinging to substrates using the mouth as a sucker, and feeding from algae or aufwuchs on roots, stones, macrophytes, and broad-leaved grasses

A diurnal animal is an animal that is active during the daytime and rests during the night. Animals that are not diurnal are either nocturnal (active at night) or crepuscular (active primarily during twilight, i.e., at dusk and dawn).