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A Fishician collection · 8 guides

Fish health & behaviour

Get to know your fish, plan new arrivals and recognize changes that need attention.

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An albino bristlenose pleco at the entrance to a breeding cave
A male bristlenose pleco guards its breeding cave. Normal behavior depends on species and context.Photo: Anthony Corda · CC BY-SA 3.0

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New to this topic? Start with Reading normal behaviour, the first guide below.

Educational, not veterinary advice. Check species needs against current sources, follow the current label for any product, and see a qualified aquatic veterinarian for severe, urgent or uncertain health problems. How Fishician sources and reviews guides. Photographer credits and licenses appear beneath the relevant guide images.