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I'm new to owning a pleco and have questions. What are the signs of a healthy and unhealthy Pleco? Mine spends daytime hiding or on the driftwood under plants and I assume this is normal. What makes me wonder is that when he's stationary his dorsal and tail fin seem clamped. Is this normal?
Sign's most easily recognized with regard's to a healthy specimen is the belly of the fish and activity level.
Healthy fish that is well fed,will have plump belley rather than concave(sunken), and will be far more active at night, than during the day.
In my expieriences with the Bristlenose, a fish that is constantly searching for food during the day, is indicator that possibly it is not getting enough vegetable,algae based food's, and is scrounging for bit's of leftover's offered other fishes.
Fat healthy Adult specimen's do indeed keep close to the wood or out of site during the day for the most part, unless food is offered.(young ones are more active)
Would not worry bout the fin's being clamped, assuming water quality/dietary need's are being met.
The clamped fins when it is attached to a surface reduce drag. The fins should be erect when the fish is on the move.
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