Red Devil Vampire Crab (Geosesarma sp. 'Red Devil')

The Red Devil Vampire Crab is one of the most striking freshwater and terrestrial crabs available in the hobby, celebrated for its vivid scarlet-red body, contrasting dark legs, and glowing yellow eyes. Small but full of personality, this captivating species is perfect for paludariums and bioactive terrariums where its natural behaviours can truly be appreciated.

Unlike fully aquatic crabs, Red Devil Vampire Crabs are semi-terrestrial, spending most of their time exploring land while regularly returning to shallow freshwater pools to drink, moult, and breed. Their inquisitive nature and bold colours make them a fascinating display species for keepers looking for something a little different.

Native to the tropical forests of Indonesia, these crabs inhabit humid environments alongside small streams, puddles, and damp leaf litter. Replicating these conditions in captivity allows them to thrive and display their natural behaviours.

🌿 Why Choose Red Devil Vampire Crabs?

🦀 Stunning bright red colouration with striking yellow eyes
🌿 Perfect for bioactive paludariums and terrariums
🧠 Active, curious, and entertaining to observe
🍂 Fascinating climbing and foraging behaviours
💪 Hardy when kept in the correct environment
🏡 Ideal for naturalistic tropical displays
✨ Small size makes them suitable for compact setups
🏆 One of the most colourful freshwater crab species available

📏 Care Requirements

🧬 Scientific Name: Geosesarma sp. 'Red Devil'
📛 Common Name: Red Devil Vampire Crab
🏠 Enclosure Size: Minimum 45 x 30 x 30cm for a small group
📏 Adult Size: Approximately 2–3cm carapace width (up to 5–6cm including legs)
🌡️ Temperature: 22–28°C
💧 Humidity: 75–90%
⚗️ Water pH: 6.5–7.5
🧘 Temperament: Generally peaceful but territorial, particularly between males
🍽️ Diet: Crab pellets, bloodworm, brine shrimp, insect larvae, small insects, vegetables, leaf litter, and calcium-rich foods
👥 Group Size: Best kept in groups with one male to two or more females

🏡 Enclosure Setup

Red Devil Vampire Crabs require a paludarium, with the majority of the enclosure consisting of land and a smaller shallow freshwater area.

A suitable setup should include:

🌿 Live tropical plants
🍂 Leaf litter
🪵 Cork bark and driftwood
🪨 Rocks and caves for hiding
💧 A shallow freshwater pool with easy access in and out
🌱 Mosses and damp substrate for burrowing

The land area should make up approximately 70–80% of the enclosure, with the remaining 20–30% consisting of shallow freshwater.

A secure lid is essential, as these crabs are excellent climbers and escape artists.

🦐 Compatibility

Red Devil Vampire Crabs are best kept in a species-only paludarium.

Suitable companions may include:

✅ Other Red Devil Vampire Crabs (with the correct male-to-female ratio)
✅ Small freshwater snails in the water section (with caution)

Avoid keeping them with:

❌ Fish
❌ Shrimp
❌ Large crabs
❌ Aggressive amphibians
❌ Reptiles
❌ Other territorial Geosesarma species

Although peaceful for the most part, they may prey on small aquatic animals and can become territorial during feeding or breeding.

🍽️ Feeding & Behaviour

Red Devil Vampire Crabs are opportunistic omnivores and should be offered a varied diet.

Suitable foods include:

🦗 Small insects and insect larvae
🩸 Frozen bloodworm
🦐 Brine shrimp
🟤 High-quality crab pellets
🥬 Blanched vegetables
🍂 Decaying leaves and biofilm
🦴 Calcium supplements to support healthy moulting

They are most active during the evening but will often be seen exploring during the day in well-established enclosures.

Providing plenty of hiding places helps reduce stress and encourages natural behaviours.

⚠️ Important Notes

Red Devil Vampire Crabs are not fully aquatic and should never be kept in a standard aquarium. They require access to both land and shallow freshwater at all times.

Maintaining high humidity is essential for successful moulting and overall health. A well-fitting lid will help retain moisture while preventing escapes.

These crabs moult regularly as they grow. During this time, they are vulnerable and should not be disturbed. It is normal for them to hide for several days following a moult.

A calcium-rich diet and access to clean freshwater are essential for healthy shell development.

With proper care, Red Devil Vampire Crabs can live for 2–3 years, providing endless fascination through their vibrant colours, climbing ability, and engaging personalities.