Purple Vampire Crab
Geosesarma dennerle
The Purple Vampire Crab (Geosesarma dennerle) is a semi-aggressive invertebrate that's a good step up once you have a little experience. Give it a tank of at least 40 litres (11 US gallons), water held at 72-79°F, and a pH of 6.5-7.5.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Indonesia (Java)
- East & Southeast Asia
Regional colours match the stocking calculator's origin map.
Purple Vampire Crab Tank Setup
A tank of 40 litres (11 US gallons) or more with rock-steady water suits them best - keep it at 72-79°F with a pH around 6.5-7.5. Stable conditions matter most, as shrimp struggle to moult and breed when parameters bounce around.
What Do Purple Vampire Crabs Eat?
They do best on small live or frozen foods like bloodworm or daphnia, rather than filler-heavy flake. Keep portions small, as uneaten food spoils quickly in warm water.
Purple Vampire Crab Tank Mates
Primarily terrestrial; paludarium setup required The Purple Vampire Crab is semi-aggressive, which is the first thing to weigh up when you choose tank mates. It's predatory, so anything small enough to fit in its mouth will be treated as food rather than a companion. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Purple Vampire Crabs Good for Beginners?
Doable once you test water regularly and catch problems before fish look sick. If this is your first tank, pick something more forgiving and come back later.
Purple Vampire Crab - frequently asked questions
What size tank do Purple Vampire Crabs need?
Purple Vampire Crabs need a tank of at least 40 litres (11 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
What water parameters do Purple Vampire Crabs need?
Keep them at 72-79°F with a pH of 6.5-7.5, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Purple Vampire Crabs eat?
Purple Vampire Crabs are omnivores and aren't fussy eaters. Feed a varied mix of good-quality dry, frozen, and gel foods, and match the food size to their mouths. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Purple Vampire Crabs good for beginners?
Purple Vampire Crabs are best for keepers with a little experience. They are manageable once you test water regularly and catch problems early; a complete beginner may prefer something more forgiving first.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Purple Vampire Crabs
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- Pea PufferPredator - Pea Puffer will eat or injure smaller tank mates
- Betta (Male)Predator - Betta (Male) will eat or injure smaller tank mates
