African Butterfly Fish and Circadian Rhythm - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 2 Old 04-13-2012, 05:20 PM Thread Starter
African Butterfly Fish and Circadian Rhythm

My butterfly fish has me wondering about the habits of the animal. No where in my research have I discovered anything about its waking-resting cycles.

During the day, my ABF sits motionless toward the bottom of my tank. Once it is evening, the fish stays at the surface through the night.

Is the ABF nocturnal, or do I have an awkward fish?
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post #2 of 2 Old 04-15-2012, 02:43 PM
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I would suggest your tank lighting may be bright. As it notes in our profile (click the shaded name African Butterfly Fish) it needs dim light, and floating plants. I had a pair of this species for many years, and the only time they ever left the surface was to jump out or if they were stressed--as when i found one on the floor and returned it to the tank, it dove to the bottom for a spell. They should remain motionless at the surface, only springing into action when "food" comes by. Or if they are interacting, this is a fish that should be in a pair (male/female) or in sufficiently sized tanks a small group. More info is in the profile.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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