Amblygobius albimaculatus, phalaena, semicinctus & sphynx are often refered to as "dragon" gobies due to their similarities. Amblygobius phalaena being the most commonly sold in the trade. It actually has a few common names.
These are a "sifting" species of goby, not algae eaters. They can sometimes (although rarely long term) be supplimented with heavily vitamin fortified foods. Most will accept prepared foods the only problem is they will not typically get the nutritional value they need from it.
Cheers
Steve