
Knight Goby
Stigmatogobius sadanundio
Family: Gobiidae • Origin: Various
Knight Goby (Stigmatogobius sadanundio) is a semi-aggressive other reaching 3.5 inches. Can be kept singly. Minimum tank: 20 gallons.
Min Tank
20 gal
Max Size
3.5"
Temperature
72-82°F
pH
7-8.5
Lifespan
4 years
School Size
Solo OK
Swim Level
bottom
Hardness
5-15 dGH
semi-aggressiveintermediatecarnivore
Care Tips
- • Max size: 3.5"
- • Temp: 72-82°F
- • pH: 7-8.5
- • Can be kept alone
- • semi-aggressive temperament
Feeding: Standard carnivore diet for Gobiidae.
Compatibility Notes: Typical semi-aggressive Gobiidae species.
Tank Setup & Water Parameters
Tank Requirements
- Minimum Tank Size
- 20 gallons
- Recommended Tank Size
- 30 gallons
- Swimming Level
- bottom
Water Parameters
- Temperature
- 72–82°F
- pH Range
- 7–8.5
- Hardness (dGH)
- 5–15
- Water Type
- freshwater
Behavior & Temperament
- Temperament
- semi-aggressive
- Aggression Level
- 3/5
- Schooling
- No
- Territorial
- Yes
- Fin Nipper
- No
- Predatory
- No
- Diet Type
- carnivore
- Growth Rate
- moderate
Typical semi-aggressive Gobiidae species.
Breeding
- Breeding Type
- egg layer
- Breeding Difficulty
- moderate
- Lifespan
- 4 years
Ideal For
20 gallon
Compatible Tank Mates
View all →Black Neon Tetra
Hyphessobrycon herbertaxelrodi
73-81°FpH 5.5-7.510+ gal
peacefulschooling 6+1.6"

Serpae Tetra
Hyphessobrycon eques
72-82°FpH 6-7.520+ gal
semi-aggressiveschooling 6+1.75"
Black Skirt Tetra
Gymnocorymbus ternetzi
70-82°FpH 6-7.515+ gal
peacefulschooling 5+3"
Congo Tetra
Phenacogrammus interruptus
75-81°FpH 6-7.530+ gal
peacefulschooling 6+3.5"
Betta Fish
Betta splendens
76-82°FpH 6.5-7.55+ gal
semi-aggressive3"
Guppy
Poecilia reticulata
72-82°FpH 6.8-7.810+ gal
peacefulschooling 3+2.5"
Similar Species
Wrestling Halfbeak
Dermogenys pusilla
75-82°FpH 7-810+ gal
semi-aggressiveschooling 3+2.5"
Peacock Gudgeon
Tateurndina ocellicauda
72-79°FpH 6.5-7.510+ gal
peacefulschooling 4+3"

Figure 8 Puffer
Dichotomyctere ocellatus
75-82°FpH 7-810+ gal
semi-aggressive3"
Amazon Puffer
Colomesus asellus
72-82°FpH 6-7.510+ gal
semi-aggressiveschooling 3+3"