Sailfin Pleco L083 (Pterygoplichthys gibbiceps)

Spot density and spacing on Loricariid plecos like this one often shifts between juvenile and adult, which is part of why L-number identification in the trade can get genuinely tricky — the same species photographed at different ages can look like two different fish. The tall, sail-like dorsal typical of this group gets more pronounced with maturity too, adding another wrinkle to picking the right L-number off a chart.

Care level: Moderate · Temperament: Peaceful · Max size: ~6" · Min tank: 40 gal · Diet: Omnivore, algae wafers + occasional protein