Thai Freshwater Crab Esanthelphusa sp.

The Thai Freshwater Crab Esanthelphusa sp. represents one or more undescribed species of the potamid genus Esanthelphusa from the forests of Thailand. These crabs inhabit small forest streams, hillside seepages, and moist valley floors in humid tropical and subtropical regions of the country, displaying the typical semi-terrestrial behaviour of the genus — spending time both in and around water.

In captivity, Esanthelphusa sp. requires a paludarium with a well-constructed land section of moist tropical soil, living moss, leaf litter, and cork bark hiding places, plus a shallow freshwater section for hydration and moulting. The carapace colour in trade specimens varies from warm brown to reddish-tan, and exact identification to species level requires specialist taxonomic work.

This species is a direct developer: females carry eggs to full-term juveniles without a free-swimming larval phase, making captive breeding possible in stable enclosures. Diet mirrors that of other forest potamid crabs — dried insects, leaf litter, blanched vegetables, and sinking pellets cover all nutritional requirements. A secure lid is essential.

Water: 22–27°C, pH 7.0–7.8, GH 5–15, KH 2–10; shallow section; dechlorinated; no copper. Tank: minimum 40 L paludarium; moist tropical soil, leaf litter, living moss, cork bark; 60–70% land; secure lid. Feeding: omnivore — dried insects, leaf litter, blanched vegetables, sinking pellets, occasional fruit; feed daily. Breeding: direct developer; female broods eggs; miniature juveniles independent on emergence. Compatibility: 1 male to 2–3 females; incompatible with fish; avoid mixing with other crab species.