SUNDATHELPHUSA PHILIPPINA CARE GUIDE

Sundathelphusa philippina

Author: Albomita

Sundathelphusa is a genus of freshwater crabs endemic to the Philippines, with some populations also found in parts of Indonesia. While widespread in their native habitat, these crabs are rarely, if ever, seen in the international pet trade. They are more commonly kept by local aquarists and researchers in Southeast Asia.

Their adaptability to moderate and fast-flowing freshwater systems, combined with peaceful social behaviour, makes Sundathelphusa philippina an excellent candidate for group aquariums and river-style biotope tanks.

Common Names

Sundathelphusa philippina may also be referred to as:
Philippine river crab
Sundathelphusa freshwater crab
Filipino freshwater crab
Native Philippine crab

Members of the Species

Sundathelphusa philippina (Pictures coming soon, hopefully!)

Conservation Level

Least Concern
This species is not currently under threat in its natural habitat and enjoys a stable population. Nonetheless, wild collection should still be done ethically and sparingly, with a focus on habitat preservation.

Care Level

Easy
This species thrives in stable, well-oxygenated tanks. It is peaceful, undemanding, and does well in both solo and group settings. Its tolerance for varied tank mates makes it well-suited for beginner aquarists with freshwater experience.

Enclosure and Environment

Sundathelphusa crabs are exclusively aquatic and naturally inhabit streams and rivers with moderate to fast flow. Mimicking this environment is key to long-term health and activity.

• Tank Size: Minimum of 1 gallon (approx. 4 litres) per crab; more space is better, especially in community setups

• Temperature: 27°C / 80°F

• Humidity: 80% (for aquaria with open tops or emergent zones; otherwise not critical in sealed tanks)

• Water Flow: Moderate to strong current preferred

• Lighting: Natural day-night cycle; no special lighting required

Use a secure lid if the tank includes driftwood or tall structures these crabs are not known escape artists, but it’s best to be cautious.

Substrate

Use pea gravel or medium-grit sand. These substrates allow for natural foraging behaviour and ensure a safe walking surface without risking injury or instability.

Cohabitation

• Naturally communal: Can be housed in groups of the same species

• Tank mates: Safe with shrimp, nano fish, and snails

• Behaviour: Peaceful; shows little to no aggression in appropriate setups

• Enrichment: Provide hiding spots and flow breaks to support natural behaviours

Diet

Sundathelphusa philippina is an omnivore with a preference for plant-based foods and detritus. A varied diet ensures optimal health.

Staple Foods:

• Blanched vegetables (zucchini, spinach, kale)

• Sinking fish pellets

• Dried Indian almond leaves (catappa) for grazing and water conditioning

Supplements:

• Occasional shrimp (frozen or fresh)

• Biofilm and algae naturally occurring in the tank

Sexual Dimorphism

Not clearly documented for this species. Further study or observation may reveal abdominal shape differences similar to other freshwater crabs.

Breeding

No known successful captive breeding of Sundathelphusa philippina has been documented outside of their native range. They may breed communally under ideal conditions, but data is limited.

Data Source

The information in this guide was kindly researched and compiled by the team at Crustacean Council, with reference to aquarist observations and native biotope studies.