Wrong. The very word "marine" means Naval infantry. Face it dude,you are the Navy's army! Please pay close attention to number 2 definition below. From the Merriam-Webster dictionary:
One entry found for marine.
Main Entry: marine
Function: noun
Date: 1669
1 a : the mercantile and naval shipping of a country b : seagoing ships especially in relation to nationality or class
2 : one of a class of SOLDIERS (emphasis mine) serving on shipboard or in close association with a naval force; SPECIFICALLY (emphasis mine) : a member of the U.S. Marine Corps