Dr. Ralph Britz, who has worked with Burmese wildlife for more than a decade, named the new species Danionella dracula after Bram Stoker's fictional vampire.
The male dracula fish have been observed to open their mouths very wide and nudge each other, but they don't draw any blood.
Photo by Ralf Britz
"After a year or so in captivity they started dying; and when I preserved them and looked at them under the microscope, I thought 'My God, what is this, they can't be teeth!' Dr. Britz told BBC News."