Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Anyway....they have a red spot on the underside. There are some microscopic photos on a thread, posted by Eric Bourgman (sp), on Reef Frontiers. When I get home I'll post the link.