Two nights ago I finally had the opportunity to watch my Onyx Percula Clownfish spawn. This pair is around 5-6 years old. The pair is the offspring of Rod's Onyx clownfish. The spawning started around 7pm cst and lasted a little over an hour. A nest of 150-200 eggs were laid on a hammer coral. They typically spawn every two weeks. The eggs hatch 8 days after they are laid around 2 hours after the lights are shut off. The pair of Onyx Percula Clownfish are in a 30 gallon cube tank that is attached to my main 240 reef system.
Here are a couple pictures:
[caption id="attachment_118" align="alignnone" width="560" caption="Onyx Percula Clownfish Spawning"][/caption]
[caption id="attachment_119" align="alignnone" width="560" caption="Onyx Pair of Clownfish Spawning"][/caption]
[caption id="attachment_120" align="alignnone" width="560" caption="Onyx Clownfish Spawning"][/caption]
This video caught the clownfish spawning. The female clownfish drops her tube and she lays the eggs. The male then comes by and fertilizers the eggs. Throughout the process they continue to clean the nest site from debris.
http://youtu.be/DBJY6uf05ew