Jelly brain with larvae inside.

[Wojtas764]

Beautiful video.These are tadpoles of Common frog[Rana temporaria].

[underwaterireland]

Thanks. I'm not sure - I was filming pike spawning and found frog's eggs in the same place. First episode was shot on 18/03, last - 30/03. But 2011 spring was very unsettled, temperature was changing constantly from below 0 to +15 C.

[VPardoel]

awesome footage

How long did it take for the eggs to hatch?

Couple of days or maybe a week i presume?