Under microscope Berghia eggs are alive but no hatch, crustacean ID?

[easyac]

Hello;
My Berghias are constantly laying eggs, unfortunately there are no larvae. I thought the eggs were unfertilized. But I examined under the microscope, the eggs are fertilized and there is a motile larva development inside.

1- Do the larvae not hatch and die inside the shell?
Or
2-Do the crustacean (copepod or amphipods) seen in the video eat the larvae? I think they do not harm the eggs, as you see the shell and shape of all the eggs look pretty ok.

Sorry for video quality.

Clodeu up crustacean

 

[kharmaguru]

I was told in the past that amphipods prey on eggs and young nudibranchs but I also had successful egg hatching with lots of amphipods in the system. Could be dependent on food availability or the species of amphipod wether they go after them.

Fyi, videos work much better if you post them on YouTube or Imgur. I could have watched yours if I could stand 20 seconds of ads each time but I guess I can't.

 

[easyac]

Thank you for your reply. Just added videos to youtube.

Close up crustacean

 

[kharmaguru]

Those are great videos. I would say since those are visibly viable, they are either being predated on or they are actually surviving in your tank and have not become identifiable yet due to their size. I assume you still have aiptasia for them to eat?