Thai Micro Spider Crab Care Guide and Species Overview

The Thai Micro Spider Crab is a fascinating and unusual fully aquatic crab known for its extremely small size and spider like appearance. Its delicate legs and slow movements make it a unique display animal for nano aquariums and specialized freshwater setups.

Origin and Background

Thai Micro Spider Crabs originate from Thailand and nearby regions in Southeast Asia. They are found in slow moving streams, canals, and heavily vegetated waters. This species is fully aquatic and does not require land access, unlike many other freshwater crabs.

Appearance and Size

This species remains very small, with a body size typically under 0.5 inches and a leg span of about 1 inch. Their thin legs and compact bodies give them a spider like look. Coloration ranges from light brown to tan, often helping them blend into plants and driftwood.

Temperament and Behavior

Thai Micro Spider Crabs are peaceful and shy. They spend much of their time hiding among plants, moss, and hardscape. They are slow movers and rely on camouflage rather than aggression for protection. Aggressive or fast moving tank mates can easily outcompete or harm them.

Tank Setup and Water Parameters

A well planted aquarium is essential. Mosses, fine leaf plants, and plenty of hiding spaces should be provided. A soft substrate such as sand is recommended.

Water temperature should be kept between 72 and 80 degrees Fahrenheit. The ideal pH range is 6.5 to 7.5 with soft to moderate water hardness. Gentle filtration is important, as strong currents can stress this species.

Diet and Feeding

Thai Micro Spider Crabs are omnivores and scavengers. They feed on biofilm, algae, decaying plant matter, and leftover fish food. Supplemental feeding with powdered foods, sinking pellets, or blanched vegetables is recommended to ensure proper nutrition.

Tank Mates

Best kept in species only or very peaceful nano tanks. Suitable tank mates may include small snails and micro fish, but care must be taken to ensure the crabs are not outcompeted for food. Shrimp may coexist but can sometimes be preyed upon if very small.

Why Choose Thai Micro Spider Crab

This crab is ideal for aquarists who enjoy rare and subtle species. Its small size and gentle behavior make it a great addition to planted nano aquariums where observation and detail are appreciated.

Conclusion

The Thai Micro Spider Crab is a delicate and intriguing freshwater invertebrate. With proper tank conditions, gentle tank mates, and careful feeding, this species can thrive and add unique character to a nano aquarium.