Family Doradidae (thorny catfishes) Overlapping plates cover sides of body. Intestinal modifications for aerial respiration. Aquarium fishes. Generally small, to more than 1 metre (3 feet). South America. About 30 genera, about 72 species. Family Auchenipteridae (driftwood catfishes) Internal insemination. Fresh and brackish water, Panama and South…
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