The University of Waikato - Te Whare Wānanga o Waikato
Faculty of Science and Engineering - Te Mātauranga Pūtaiao me te Pūkaha
Waikato Home Waikato Home > Science & Engineering > BioBlog
Staff + Student Login

the beauty of biscuits...

... sea biscuits, that is - what we call sand dollars. PZ has just posted a video clip of the early development of sand dollars, & it's absolutely gorgeous. It starts, as he says, with a bit of echinoderm porn - I never knew that sand dollar sperm looks like that whipped 'cream' stuff that come out of a pressurised can! And then you get to see fertilisation, cleavage, the early larval stages - which baby sand dollars spend, like all other echinoderm larvae, as plankton - and metamorphosis into this gorgeous little juvenile. Which is tiny - the clip shows it moving about (on its little tube feet) among individual sand grains. Quite lovely.

| | Comments (0)
Share via Email Share this on Twitter Share this on Google+ Share this on Facebook

Leave a comment