This looks like fun. I am wondering how many students mix the urchin anus and mouth... :D
What happened to the eggs after the experiments? Have you been growing them or have there just been classified as waste?
RE: Developing a Developmental Lab #4: Sea Urchin Fertilization
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Developing a Developmental Lab #4: Sea Urchin Fertilization
Few students made the mistake because the mouth and anus are pretty distinct and it's hard to poke the anus with a needle :P
We threw out all the eggs after the experiments. No real need for em and no one wanted to try growing sea urchins.
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Thanks for the extra bits of information (I have never checked an urchin from the very close to be honest... so I didn't know ;) )
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