This unusual goby has been discovered by Peter Wirtz on São Tomé. A characteristic of this animal is that it is unique in behavioral biology. It's symbiotic relationship with the shrimp lobster Axiopsis serratifrons serves as a model of how the symbiosis between shrimp gobies and pistol shrimp has developed.
Didogobius amicuscaridis and its partnering shrimp lobster do live in symbiosis, they do not, however, show the same tight relationship as shrimp gobies and pistol shrimp (e.g. they are not constantly in touch via the shrimps' antennae).
This species also owes its name to this distinctive characteristic: "amicus caridis" means "lobster friend".