Family: Gobiidae
Chestnut Goby — a Gobiidae from Japan & the NW Pacific, peaceful except over a chosen cave. Reaches 8.2–12.1 cm; pairs or small groups with ample hiding spots. 18–26 °C.
Chaenogobius annularis is a Gobiidae from Japan. In the wild it prefers shallow streams and estuaries over sand; in the aquarium it stays peaceful except over a chosen cave. Plan on 8.2–12.1 cm of adult fish at 18–26 °C. In a community tank it pairs well with Non-goby bottom fish.
A moderate-level species: peaceful except over a chosen cave; stable water matters more than fancy equipment.
Hold 18–26 °C and keep it stable — 18–26 °C typical for the family. Stable temperate range.
Full size is 8.2–12.1 cm. Minimum tank: 176 L, with open swimming space along its bottom-dwelling habits.
Predatory bottom-picker; offer varied small fare. Feed two small meals a day rather than one large one.
Yes, with care. Peaceful except over a chosen cave — pair it with Non-goby bottom fish — Ignore its territorial posturing and skip Large aggressive fish — Shatter its sense of cover.
Native to Japan, where it lives in shallow streams and estuaries over sand. Still to gentle current; Moderate.
Low escape risk, but a lid is cheap insurance.
In the aquarium: lays eggs in a sheltered cavity; males fan and guard. Males larger and more colourful.