Species profile
Siamese Algae Eater
Crossocheilus sp.
Peaceful
Moderate care
200 L minimum aquarium
12–16 cm adult size
Bottom–mid
Minimum group: 5
About this species
General notes for hobby use.
Trade-name Siamese Algae Eater profile; identity must be confirmed before assigning a Crossocheilus species.
Water parameters
Suggested general range for long-term care.
Temperature
24–26 °C
pH
6–8
GH
5–20 dGH
KH
Not yet documented
Flow preference
High
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Minimum group: 5
Tank zone
Bottom–mid
Territory level
Low
Predation risk
None
Bioload factor
1.6
Active rheophilic grazer that benefits from conspecific company and long swimming space. Older individuals broaden their diet and should not be bought as a one-job cleaning tool.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
Yes
Snail safe
Yes
Cave breeder
No
Digs substrate
No
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Omnivore
Minimum aquarium volume
200 L
Minimum footprint
120 × 45 cm
Alternative names
Siamese Algae Eater, Crossocheilus oblongus, Crossocheilus langei, Crossocheilus siamensis (trade usage), Siamese Flying Fox
Native range
Mainland Southeast Asia at trade-group level; exact range depends on the species actually supplied.
Natural habitat
Fast, well-oxygenated streams and rivers with rock/wood surfaces supporting periphyton and algae.
Diet & feeding
Aufwuchs/algae grazer that also takes small invertebrates and prepared foods; dietary breadth increases with age.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Reliable visual sexing is difficult; mature females may become fuller-bodied.
Breeding
Routine home-aquarium breeding is not well established for the trade animals sold under this name.