No baby shrimp: identify the stage to investigate

First distinguish not seeing eggs, seeing berried females but no visible young, and young that later disappear. Record what you actually observed and when. These situations call for different checks; adding minerals or food without that information may worsen an existing problem.

Does reproduction fit this species?

Neocaridina davidi hatches as a small shrimp. Amano, Caridina multidentata, has larval development requiring a separate approach involving saline water. Amano eggs or larvae in freshwater therefore do not establish that young bottom-grazing shrimp will develop there automatically. Caridina alone does not identify the breeding strategy; confirm species or line.

You see no eggs

• Ask about the purchased group’s age and sex. Colour or size alone cannot establish that you have mature males and females.
• Distinguish a saddle inside the body from eggs carried beneath the abdomen. If unsure, discuss clear photographs with the supplier.
• Follow general condition, grazing, food uptake and water measurements. With losses, improving husbandry takes priority over stimulating breeding.
• Newly purchased or immature animals need not reproduce within a fixed interval. Do not automatically add animals before assessing the aquarium and group composition.

You saw eggs but no young

A hidden female or empty abdomen does not establish what happened to the eggs. Small young are easily overlooked among moss and furnishings. Observe quietly at different times without dismantling the tank. Record when eggs were carried and whether you actually saw hatching or loss. Do not treat a laboratory incubation figure as a deadline for every aquarium.

Check possible predation, filter intakes, maintenance and water changes. Fish that leave adults alone may still eat juveniles. Extra cover cannot eliminate this risk. A separate breeding tank first needs suitable water, space and established filtration too.

Previously observed young disappear

Consider whether this is limited visibility or actual loss: compare consistent quiet observation periods and safely check prefilters or collection equipment. Assess grazing space and whether small animals can access food. Biofilm may matter, but visible film does not establish complete nutrition. Distribute suitable food only while checking uptake and leftovers; do not blindly add extra powder.

When concerned, measure ammonia, nitrite and temperature, including pH, GH, KH and conductivity if the water changed. Loss of balance, repeated deaths or problems in adults require the problem route, not a breeding trick such as a sudden cold water change. Keep observations using the checklist and seek informed help when the cause remains unclear.

Sources and scope

• UF/IFAS: Cherry shrimp, Neocaridina davidi
• Kondo, Hamasaki & Dan (2021): Caridina larval performance
• Viau et al. (2020): Neocaridina davidi in a biofilm-based culture system
• LICG: Zoetwatergarnaal
• UF/IFAS: Ammonia in Aquatic Systems

Reproductive biology is supported for the named species. These checks are an editorial investigation sequence, not a diagnosis or demonstrated ranking of causes. Laboratory growth is not converted into a fixed home-breeding timetable.