Diadema urchin sperm

pwnell · Post by **pwnell** » Sun Mar 17, 2013 10:31 am

I was very fortunate when i had happend to have my eye on my reef aquarium when the large Diadema (long spine) urchin started spawning. It released large puffs of white sperm into the water column at regular intervals. This process went on for at least 3 minutes.

I managed to take a sample from the water near his body and here is what I found:

Diadema urchin sperm, 40x, DIC

Diadema urchin sperm, 40x, PC

Charles Krebs · Post by **Charles Krebs** » Thu Mar 21, 2013 9:25 pm

An excellent example of of how phase contrast can really show certain details far better than DIC.