Court jester goby size: how big does it get?

Adults reach about 7 cm. The largest on record measured 8.5 cm (standard length). Record sizes among the 75 Gobiidae species on LumaReef: 1.3 cm (Creamback Dwarfgoby) to 55.3 cm (Violet Goby).

Court jester goby tank size: what is the minimum?

A tank at least 60 cm long. In LumaReef that is the Nano tank or larger.

Court jester goby water parameters: what does it need?

Temperature 23–27 °C, pH 7.8–8.5. Close to what most Gobiidae on LumaReef need (22–27 °C).

Court jester goby tank mates: what can it live with?

It gets along with 89 of the 99 reef species in the catalogue, such as Percula clownfish, Green chromis, and Cherub angelfish.

Court jester goby depth: how deep does it live?

In the wild, 2 to 30 m down. Close to most Gobiidae on LumaReef (2–30 m).

ReefIn the market260 coinsCommon

Court jester goby

Koumansetta rainfordi

It digs no burrow, drifting just above the sand picking hair algae.

The Court jester goby (Koumansetta rainfordi) is a tropical marine fish of the family Gobiidae. It lives on and around reefs, between 2 and 30 m deep. Adults grow to about 7 cm; the largest on record measured 8.5 cm (standard length). In the aquarium it needs a tank at least 60 cm long and water at 23–27 °C.

Size: 7 cm
Smallest tank: 60 cm
Temperature: 23–27 °C
Care: Moderate

In the aquarium

Temperature23–27 °C

pH7.8–8.5

Temperament: Peaceful
Diet: Omnivore
Activity: Moderate
Water layer: Bottom
Group: Lives on its own
Coral: Reef safe

These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.

Which tank it fits

Nano60 cm · 65 litres8 of them
Standard90 cm · 180 litres22 of them
Wide120 cm · 300 litres37 of them
Living room180 cm · 650 litres81 of them
Showcase250 cm · 1,200 litres150 of them
Gallery300 cm · 1,440 litres180 of them

Who it lives with

Gets along89 species

and 65 more species

Caution1 species

Narrow shared temperature range

Lined seahorse

Not together9 species

Aggressive with peaceful

In the wild

Water type: Marine
Climate zone: Tropical
Habitat: Coral and rocky reefs
Largest on record: 8.5 cmstandard length, tail fin excluded
Aquarium trade: Traded commercially

Depth

surface

2 m30 m

Conservation status

Classification

OrderGobiiformes
FamilyGobiidae
GenusKoumansetta
SpeciesKoumansetta rainfordi
Described byWhitley, 1940

In other languages

English: Old Glory
French: Gobie de Rainford

Quick answers

Court jester goby size: how big does it get?: Adults reach about 7 cm. The largest on record measured 8.5 cm (standard length). Record sizes among the 75 Gobiidae species on LumaReef: 1.3 cm (Creamback Dwarfgoby) to 55.3 cm (Violet Goby).
Court jester goby tank size: what is the minimum?: A tank at least 60 cm long. In LumaReef that is the Nano tank or larger.
Court jester goby water parameters: what does it need?: Temperature 23–27 °C, pH 7.8–8.5. Close to what most Gobiidae on LumaReef need (22–27 °C).
Court jester goby tank mates: what can it live with?: It gets along with 89 of the 99 reef species in the catalogue, such as Percula clownfish, Green chromis, and Cherub angelfish.
Court jester goby: alone or in a group?: It can be kept on its own.
Court jester goby and corals: is it reef safe?: Yes, it leaves corals alone.
Court jester goby depth: how deep does it live?: In the wild, 2 to 30 m down. Close to most Gobiidae on LumaReef (2–30 m).