Females carry the eggs under the abdomen and release free-swimming zoea larvae into the water; the larvae pass several stages and can only be reared in marine water. Captive breeding is possible but rarely done.
Not practical.
Brackish paludarium with a sand beach.
Gravid female to seawater.
Thousands of eggs.
Planktonic larvae.
One breeding tank for the fiddler crab, drawn to scale from the breeding guide.
Water: Unknown · sand bottom
A plan from the breeding guide and an adult size of 3 cm. Tank shape is a standard 2 : 1 : 1.2 box, at least 6 adult lengths long. Check each step in the guide above.
A 120 cm rack for breeding the fiddler crab in numbers.
In total: 4 tanks, about 324 L of water. A litre of water weighs about 1 kg, so check that the floor and rack can take the weight.
Sizes are worked out from the breeding tank in the guide. Tanks fit a standard 120 cm rack when they can; bigger tanks go on their own stands.
Males have one greatly enlarged claw (on either side) that they wave; females have two small claws of equal size.
Typical for need salty water for larvae
These need brackish or sea water to raise. Not a beginner project.
Surviving young are slowly moved back to fresh water.
A general guide for this breeding type. Days change with temperature and species.
These need brackish or sea water to raise. Not a beginner project.
Set up a virtual breeding tank and see what would likely happen.
An educational estimate from the breeding rules, not a promise.