Didogobius amicuscardis is a species of marine fish in the family Gobiidae, the gobies. It is endemic to São Tomé and Príncipe, where it occurs at depths from 7to. The species was named and described by Kovačić and Schliewen in 2008.[1]
The fish grows to maximum 3.2 cm length. The fish are found in burrows of the shrimp Axiopsis serratifrons; its specific name amicuscaridis is a compound noun which means "friend of shrimps" in reference to this association.[2] It feeds on sea snails from the families Scissurellidae, Rissoidae, and Limacinidae.