Cool fish for a 40 would include; swales basslet, yellow assessor, royal gramma, chalk bass, lantern basslet, midas blenny, stigmatura blenny, a group of barnacle blennies, a grammistes blenny, a group of zebra dartfish, a group of blue gudgeon dartfish, firefish, watchman goby, neon goby, sunburst anthias, yellowhead jawfish, purple tilefish.