Colombian Ramshorn Snail

Marisa cornuarietis

Also sold as Giant ramshorn snail · Colombian giant ramshorn apple snail

Colombian Ramshorn Snail (Marisa cornuarietis) is a peaceful freshwater snail that reaches about 5 cm (2 in) and swims along the bottom. It wants 64–82°F (18–28°C) and pH 7.2–8, can be kept singly, and needs a tank of at least 40 L (11 gal).

At a glance

Type	Snail
Adult size	5 cm (2 in)
Minimum tank	40 L (11 gal)
Group size	Can be kept singly
Temperature	64–82°F (18–28°C)
pH	7.2–8
Temperament	Peaceful
Eats shrimp	No

Before it goes in

Colombian Ramshorn Snail needs at least 40 L (11 gal). The smallest size in this library that clears that is the 15 Gallon.
It leaves shrimp and small fish alone.
It holds at 64–82°F (18–28°C). That shares a window with Betta and Cherry Shrimp.
It eats most plants. Hygrophila corymbosa 'Siamensis' and Bacopa caroliniana will not last with it; tough-leaved Anubias nana 'Petite' and Marimo Moss Ball will.

What tank size does it need?

At least 40 L (11 gal). The smallest size here that clears it is the 15 Gallon.

Will it eat shrimp?

No — adult shrimp and their young are both safe with it.

What water does it want?

64–82°F (18–28°C), pH 7.2–8.

Good tank mates

Tank mates from this library that share its temperature window, are peaceful and eat neither it nor its young: Cherry Shrimp, Goldfish, Bristlenose Pleco, Celestial Pearl Danio and Molly.
Plants that hold up with it: Anubias nana 'Petite', Marimo Moss Ball, Subwassertang and Anubias barteri.

Often compared with

	Colombian Ramshorn Snail	Ramshorn Snail	Mystery Snail
Adult size	5 cm	2 cm	5 cm
Min tank	40 L	5 L	20 L
Group	1+	1+	1+
Temperature	64–82°F (18–28°C)	64–82°F (18–28°C)	68–82°F (20–28°C)
Eats shrimp	No	No	No

More livestock

Plan a tank with Colombian Ramshorn Snail →

Sources (3) · checked Sep 2026