This list pulled information for all of Tanzania, so it isn't specific to Dar.
The broadhead sleeper (Eleotris melanosoma) is a species of fish in the Eleotridae family. It is found in American Samoa, Fiji, French Polynesia, Hong Kong, India, Indonesia, Japan, Malaysia, Maldives, Mozambique, New Caledonia, Palau, Panama, Papua New Guinea, the Philippines, Samoa, South Africa, Taiwan, and Tanzania.