Corydoras Activity Level

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May 9, 2009
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Davidsonville, MD
I visited a local fish store today (House of Tropicals in Glen Burnie, MD) and saw more Corys than I've ever seen before. One thing that surprised me was that most of the Corys in most of the tanks were idle on the bottom, even when they were in large schools. One exception were the Albinos. Are Albinos just naturally more active? Is the behavior of the other Corys I saw normal?
 
At my work I always see the albinos swimming around and the others kinda hangin out.
 
i have four emerald cories and they are some of the most active fish in my tank, going back and forth, doing 'the wave' across the front glass, lol, all day and all night. they do take breaks between the stem plants for a rest now and then, but that's short lived, until one takes off on another wave mission and the others follow suit.

one thing i wonder about is if an lfs is feeding their fish well enough. a fish that doesn't get it's nutritional requirements met is most likely going to be less active.
 
I have now and have kept in the past several types of cories ..... panda, false julii, sterbai, albino anaeus, black anaeus, pygmy.....and by far the most active all day, every day are the anaeus....doesn't matter what color they are the most active and entertaining. They are never in the back of the tank or under something hiding, even with my hands in the tank.
 
I'm no expert having kept Corydoras all of... oh, 20 hours... (although I've admired them for much longer than that)...Nonetheless, I now have Albino and Bronze aeneus and some Paleatus.

So far mine don't seem to "school" but they stay fairly close together in groups- within eyesight of each other.

They're not used to me yet... so they're a little skittish if I make too sudden a movement, especially the Peppers- but other than that they all seem fairly active. (although with periods where they all rest in the shade of the caves).

I will say though that the Albinos seem to be the least sensitive to my movement- and are least bothered by me. This might have been the reason they were more active in your fishstore you visited- they "appear" braver.

I have read in the past that albinism in many animals leads to poorer eyesight because of lack of pigmentation in the eye.

The albinos might be more active in a fishstore because they are less freaked out by the giant humans outside their glass... not being able to see them.



Just a theory- I really don't know though.
 
Mine have different levels of activity throughout the day. I've got pygmy and habrosus and they will chill at the bottom often and than zoom around if there's some stuff to do (whatever fish do). I've noticed they're very protective of the fry in the tank. Possibly because they live in the same caves.
 
I've noticed that the habrosus and pygmaeus spend a lot of time up in the water column with the guppies. Of the thirty or so varieties of cory I keep, C. aeneus and pygmy are the most active and C. schultzei, teniente, and eques are the least. When you feed, it gets them all going. LOL Your results may vary.
 
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