Some populations of D. antillarum have been observed to congregate during their spawning season. There is no mating of individuals as fertilization and gestation occur in the open water.
The spawning of D. antillarum appears to be connected to the lunar calendar. During the summer season, the egg and sperm are released once during each lunar month. This spawning period is dependant upon temperature; populations in different hemispheres may spawn at different times depending on when the warm season occurs.
The egg and sperm are released into the water where they are fertilized and develop into the larval echinopluteus. Egg size has also been observed to change during the month. Spawning occurs when the eggs are largest.
Breeding interval: Spawning is temperature dependent.
Breeding season: In summer, eggs and sperm are released each lunar month.
Key Reproductive Features: seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (External )
There is no parental involvement post-spawning.
Parental Investment: pre-fertilization (Provisioning)