Health
Ghost Shrimp Molting: What's Normal and What Isn't
6 min read · Updated April 2026
Shrimp grow by shedding their exoskeleton. The empty shell they leave behind is nearly identical to a dead shrimp at a glance, which causes a lot of unnecessary panic — and the failure of this process is one of the leading causes of real shrimp death.
Is it a molt or a dead shrimp?
A molt is a hollow, perfectly clear shell, usually split at the joint between the head and body, with no pink or opaque tissue inside. A dead shrimp turns opaque white or pink within hours and holds its shape. If you can see through it completely, it is a molt — leave it in the tank so the colony can eat it and recover the minerals.
How often they molt
Juveniles molt every one to two weeks; adults every three to four. A shrimp that just molted is soft, pale and vulnerable for several hours and will hide. That is why cover is not optional.
White ring of death
A visible white band or gap at the junction between the carapace and abdomen, on a shrimp that is not molting, indicates a stuck molt. The shrimp cannot free itself and usually dies within a day. There is no reliable treatment once it appears — the fix is prevention.
- Keep GH between 6 and 15 dGH
- Offer calcium-rich foods and a cuttlebone or crushed coral if hardness runs low
- Avoid large water changes that swing TDS suddenly
- Keep nitrate low and temperature steady
Mass molting after a water change
If several shrimp molt at once shortly after a water change, the new water was significantly different from the tank water — usually cooler or with a different TDS. Smaller, slower changes prevent it. Repeated mass molts wear a colony down.