Species profile
Mystery Snail
Pomacea diffusa
Peaceful
Easy care
40 L minimum aquarium
4–6 cm adult size
Bottom all
Can be kept singly
About this species
General notes for hobby use.
Large decorative snail. Adds minor bioload; lays clutches above waterline.
Water parameters
Suggested general range for long-term care.
Temperature
21–26 °C
pH
7.2–8.2
GH
From 8 dGH
KH
Not yet documented
Flow preference
Low–moderate
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Can be kept singly
Tank zone
Bottom all
Territory level
None
Predation risk
None
Bioload factor
0.5
Peaceful large snail. Provide calcium/mineral availability and a secure lid while leaving an air gap above the waterline for normal breathing and egg laying.
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
40 L
Minimum footprint
45 × 25 cm
Accepted scientific name
Pomacea diffusa
Alternative names
Mystery Snail, Spike-topped Apple Snail, Pomacea bridgesii (common historical trade misapplication)
Native range
South America, including the Amazon basin.
Natural habitat
Warm slow freshwater habitats. In aquaria use stable, mineral-rich water to protect shell growth and avoid copper-containing treatments.
Diet & feeding
Scavenging omnivore that takes algae, biofilm, prepared snail foods and vegetables; supplement calcium-rich foods/mineral sources where needed.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Not reliably sexed by shell colour or shape; males can be identified by reproductive anatomy beneath the mantle when handled/observed carefully.
Breeding
Sexes are separate. Female deposits a conspicuous clutch above the waterline; the eggs must remain humid but not submerged.