Engineer Goby (Pholidichthys leucotaenia)
Sold as cute striped juveniles that become large eel-like burrowers — fascinating excavators that need soft substrate and room to dig.
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Chinese Algae Eater (Gyrinocheilus aymonieri)
Often sold as a harmless algae eater — adults grow large, territorial, and may graze fish mucus. Know the real husbandry before you buy.
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