Chaetoceros debilis is a widely distributed yellow-brown diatom that occurs in cooler, shallow, near-shore waters during late winter and into the spring. The cells are rectangular and connected in spiraling chains. They are photosynthetic and reproduce sexually and asexually. It is thought that they may cause physical damage to fish gills (“Chaetoceros debilis“, 2012). Some tintinnids graze on algal blooms and help prevent further growth of the bloom (Admiraal & Venekamp, 1986).
The original photo for the featured Chaetoceros debilis image can be found here: http://www.seasonsinthesea.com/photos/ocean/chaetoceros-debilis-300.jpg