Cajun Dwarf Crayfish Breeding Guide

Breeding the Cajun Dwarf Crayfish (Cambarellus shufeldtii), a small North American dwarf crayfish that carries eggs and young under the tail with direct development.

Overview

The Cajun Dwarf Crayfish (Cambarellus shufeldtii) is a small North American dwarf crayfish of the Cambarellinae, a subfamily whose species typically reach only about 4 cm versus the >5 cm of most crayfish. It occurs across the Gulf states, including Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee and Texas, and is introduced in Georgia; it favours slow-moving and standing water with plant cover and burrows into the substrate during dry periods.

Sexing

Sexes are told apart by the abdominal appendages typical of Cambarellus: males have modified front pleopods used to transfer sperm, while females carry the sperm-receiving structure between the rear legs and a broader abdomen suited to holding eggs.

Breeding Setup

Provide a planted tank with dense cover and a soft substrate the animals can dig into, reflecting their habit of burrowing during dry periods. The species is aggressive toward other crayfish, so abundant separate hides reduce conflict and give a berried female a secure refuge.

Berried Female & Young

Reproduction is direct, with no larval stage: the female carries her eggs attached beneath the abdomen and then the hatchlings, which later detach and become free-living, as is typical for dwarf crayfish.

Juvenile Care

Young crayfish are tiny and omnivorous, feeding on biofilm, detritus and fine sinking foods. Dense planting and many hides help them avoid cannibalism, and the brood should be thinned out into more space as it grows.