The Mystery of the Foam on the Sea Shore
- Article by Wim van Egmond on the microscopic alga Phaeocystis, which forms part of the phytoplankton and is believed to be the cause of foam on the sea.
- http://www.microscopy-uk.org.uk/mag/artapr01/foam.html

Cryptomonad
- Information from Wikipedia on this small group of flagellates, most of which have chloroplasts.
- http://en.wikipedia.org/wiki/Cryptophyta