GobiesGobiidae

Gobies are diverse, bottom-dwelling fish. Most species are less than 10 cm (3.9 in) long, though some exceptionally reach over 30 cm (0.98 ft). The group includes some of the world's smallest known vertebrates; 🌊 Red Sea species like Trimmatom nanus measure less than 1 cm. They have elongate, often compressed bodies and two dorsal fins. Many species exhibit cryptic, camouflaged patterns, blending with their surroundings. A distinguishing feature is their fused pelvic fins, which form a disc-like sucker used for gripping sand, rocks, or corals.

Ubiquitous residents of reef systems, gobies inhabit diverse environments from shallow reef crests to deeper reef slopes, commonly found down to 60 m (200 ft). They live on sand, rubble, or within crevices and coral branches. Most species are carnivores, feeding on small invertebrates, copepods, and zooplankton picked from the substrate or water column. Many gobies are territorial, often seen resting on the substrate and darting into cover when approached. A notable behaviour is the commensal relationship some species form with burrowing shrimp, sharing a single burrow.