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Panther Crab
Parathelphusa pantherina
📍 Southeast Asia
The Panther Crab is a semi-aquatic freshwater crab native to Southeast Asia, known for its striking dark coloration and relatively peaceful demeanor compared to other crab species. These crabs are excellent scavengers and spend time both in water and on land, requiring a setup with adequate terrestrial areas. They make fascinating additions to larger aquariums but require careful tank mate selection due to their predatory nature.
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Care Guide
Diet
Panther Crabs are opportunistic omnivores that consume algae, detritus, and small invertebrates. Feed sinking pellets, blanched vegetables like zucchini and spinach, and occasional protein sources such as bloodworms or small shrimp 2-3 times weekly. They are excellent scavengers and will supplement their diet with leftover food and decaying plant matter in the tank.
Behavior
Panther Crabs are primarily nocturnal and spend considerable time on land and in shallow water areas. They are solitary and territorial, often hiding during the day in caves or under decorations. They are active scavengers and will dig and rearrange substrate, which can uproot plants and disturb tank décor.
Breeding
Breeding Panther Crabs in captivity is extremely difficult and rarely successful in home aquariums. Females produce larvae that require brackish water conditions to develop properly, making captive breeding impractical for most hobbyists. No specific breeding conditions are reliably documented for home aquarium settings.
Tank Mates
Large snails can coexist but may be preyed upon; monitor closely
Hard shells provide protection from predation
Non-living décor that won't be harmed
Both are predatory; may compete or fight
Will be hunted and consumed by the crab
Large shrimp may survive but predation risk exists
Common Diseases
Shell Rot
Soft spots on carapace, discoloration, visible erosion or pitting of shell surface
Improve water quality, increase water changes, maintain proper pH and hardness; remove crab if severely affected and treat in isolation with antibacterial medication
Parasitic Infection
Lethargy, loss of appetite, visible parasites on body or legs, abnormal molting
Quarantine affected crab, perform frequent water changes, treat with appropriate anti-parasitic medication; maintain pristine water conditions
Molting Complications
Inability to shed exoskeleton, incomplete molting, crab becoming stuck in old shell
Ensure adequate calcium and minerals in water; provide humid terrestrial areas; do not attempt to force molting; maintain stable water parameters
Bacterial Infection
Cloudy appearance on limbs, open wounds, discoloration, lethargy, loss of appetite
Isolate in quarantine tank, perform daily water changes, treat with broad-spectrum antibacterial medication, improve water quality and reduce stress
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Quick Facts
- diet
- omnivore - scavenges for detritus, algae, and small invertebrates; supplement with sinking pellets, blanched vegetables, and occasional protein
- lifespan
- 3-5 years
- max size
- 7.5 cm (3 in)
- tank size
- 20 gallons minimum
- temperament
- semi-aggressive
Water it likes
- ph
- 6.5-7.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 4-8 dGH
- temperature
- 75–82°F (24–28°C)