Marcian took the regnal name of Imperator Caesar Flavius Marcianus Augustus upon his coronation. The emperor angelfish ("Pomacanthus imperator") is a species of marine angelfish. There is a debate that the Boa Constrictor Imperator represents a separate species. S. B., was Holy Roman Emperor ("Romanorum Imperator") from 1014. The English word "emperor" derives from "imperator" via . An emperor (from the Latin "imperator") is a type of monarch. He was the first Spanish ruler to consistently style himself "emperor" ("imperator"). "Boa imperator", like other "Boa" species, are nocturnal ambush predators. Another well known population of "Boa imperator" is the population from Nicaragua. Another title often used was "imperator", originally a military honorific. It is to the "imperator" Titus. Tristan becomes the Imperator of Supremo's vampires. They regrouped the following year in Sardis, where their armies proclaimed them imperator. She was commissioned as the USS "Imperator" (ID-4080) in early May 1919. If the "Imperator" was present they served as his bodyguard.