Abstract
Pipefishes, sea horses and sea dragons belong to the family Syngnathidae, that present the body fully covered by bony rings, a small and terminal mouth, and by the males having a brood pouch. The pipefish species Microphis lineatus (Kaup 1856) occurs in freshwaters, brackish and marine waters along the Atlantic coast from the United States to Brazil. It presents a taxonomic history full o…