Two Little Fishies Giant Clams. By Daniel Knop The biology of tridacnid clams, the 'Killer Clams' of the South Pacific Reefs. Harmless & unique creatures, they are popular aquarium pets because of the beautiful colors & patterns of their fleshy mantles. This book also covers reef aquarium lighting, filtration, water chemistry, protein skimmers, tank construction and coral propagation. 255 Pages hadcover.