Water parameters
Overview
The knight goby is a brackish-water goby recognized by the scattered black spots on its light gray to yellowish body and the long-rayed dorsal fin of the males. It lives in estuaries and mangroves. It stays around 8 cm. It can survive in fresh water for a while, but in the long term it stays healthy in slightly salty water.
Tank Setup
- At least 80 liters for one male and several females.
- Slightly brackish water made with marine aquarium salt: a specific gravity of 1.003–1.008.
- A cave, rock hollow or pipe for each individual.
- Sand substrate and sturdy rock decor.
Diet
Carnivorous. Frozen bloodworms, mysis, brine shrimp and small shrimp; it gets used to sinking granules over time.
Behavior and Compatibility
Territorial; it defends its cave against other males and bottom dwellers. It eats small fish and shrimp that fit in its mouth.
Good companions: species too big to fit in its mouth that adapt to the same salinity: mollies acclimated to brackish water, Indian glassfish, medium-sized brackish fish such as scats and silver monos.
Avoid: small species such as bumblebee gobies, shrimp, large brackish-water predators.
A short profile for this species
The Knight Goby page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.
Tank mates
This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.
Usually compatible
Bumblebee Goby
Atlantic Mudskipper
Black Devil Snail
Sheepshead Minnow
Dragon Goby
Red Claw Crab
Mangrove Rivulus
Mummichog
Should not be kept together
Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
Change history and contributors
- Page created · October 16, 2026