Bumble Bee Goby (Brachygobius sp.)

Like every true goby, the bumble bee's paired pelvic fins have fused into a single suction disc on the belly — the anatomical feature that actually defines the whole goby family, letting it anchor against current in the tidal, brackish creeks it calls home rather than fighting the flow with fin power alone. That bold black-and-yellow banding does double duty as a size-exaggerating warning display against anything sizing it up as a meal.

Care level: Moderate · Temperament: Peaceful, semi-territorial · Max size: ~1.5" · Min tank: 10 gal · Diet: Carnivore, small live/frozen foods