Longtail Tadpole Shrimp

Geographical Origin and Habitat: Triops longicaudatus is native to the Americas, found widely in North America and parts of South America. It inhabits temporary rainwater pools, vernal basins, and seasonal wetlands. These habitats dry out completely, forcing the species to adapt by producing highly resistant eggs (cysts).

Taxonomy: Belonging to the family Triopsidae, this branchiopod is often called a "living fossil" as its morphology has remained unchanged for over 70 million years. It features a wide, flat carapace shield, two compound eyes plus a simple naupliar eye, and a long segmented abdomen with caudal furca.

Social Behavior: Hyperactive, non-social, and opportunistic. They swim and dig constantly. They exhibit strong cannibalistic behaviors toward smaller conspecifics if crowded or underfed. They have a short, intense lifespan adapted to temporary pools.

Coloration and Sexual Dimorphism: Typically translucent greyish-green to golden-brown. Most populations consist of self-fertilizing hermaphrodites or parthenogenetic females, though rare males exist; no external sexual dimorphism is visible in the aquarium.

Tank Setup: A small tank of 10-20 liters is sufficient.

ESSENTIAL REQUIREMENT: A substrate of fine sand at least 2-3 cm deep is required, as they dig constantly. Coarse gravel is unsuitable. Use a gentle sponge filter or a simple air stone to prevent larvae from being sucked in.

Diet and Feeding: Voracious, fast-growing omnivores. They feed on organic detritus, algae, micro-crustaceans, fish flakes, sinking pellets, blanched vegetables, and small meaty foods. They must be fed multiple times a day to reduce cannibalism.

Water Quality: Adaptable to adult conditions: temperature 22-26°C, pH 6.5-8.0, and GH 4-15. However, hatching the eggs requires pure RO or distilled water with extremely low mineral content to simulate rainwater. Adults tolerate harder water. Copper is toxic.

Compatibility and Tankmates: Best kept in species-only setups. They can be housed with small, peaceful snails. Do not house with fish; larger fish will eat the Triops, and Triops will actively try to nibble on and consume small, slow fish or fry.

Aquarium Breeding: Easy and highly educational. They reach maturity in about 2 weeks and bury eggs in the sand. Once the adults die (natural lifespan 60-90 days), dry the sand completely for 2-3 weeks. Re-flooding the dry sand with RO water hatches the next generation.

Risks and Diseases: Cannibalism is the leading cause of loss if feeding is inadequate. Naturally short lifespan of 2-3 months. Molting failures can occur due to sudden temperature drops or low dissolved oxygen levels during their rapid growth stages.