HORTICULTURE

Detailed explanation-1: -The egg hatches to the zoea larva which, when healthy, swims on the water surface. Usually 7-20 days are needed for embryonic development and hatching. However, this is entirely dependent upon the temperature and salinity of the medium. There are eight zoea stages in the development of Scylla oceanica and S.

Detailed explanation-2: -The zoeae were transferred into the culturing cement pond containing eigthteen tons sea water of 30 to 33 ppt salinity and were fed with rotifer and newly hatched artemia daily.

Detailed explanation-3: -Appearance: Crab zoea larvae have a strong and almost spherical carapace to which the legs it uses for swimming are attached. Legs are absent on the long and extended back. The often long and prominent rostrum always points downwards, but can on occasion also be absent.