Remoraid is a light blue, fishlike Pokémon with saucer-like eyes, and a mouth with four pointed teeth. There are two dark stripes on its back that resembles the barrel of a revolver. It has a single pelvic fin positioned like a revolver's trigger, two small pectoral fins, and a dorsal fin near its mouth resembling a gun's front sight. In addition, it has two caudal fins, the bottom of which resembling the butt of a gun and the top resembling the hammer. All of its fins except for the dorsal fin are white.
Remoraid is well known for its ability to shoot jets of water from the surface with incredible accuracy and distance, often to shoot down flying insect prey out of the air. The water attack can reach its prey to about 300 feet. Because of this Remoraid is referred to as "sniper of the seas". It tends to travel by attaching to Mantine's fins or in large groups of its own kind. When attached to a Mantine, it feeds on whatever the Mantine leaves behind, but will fight alongside it as well. Remoraid is a sea-dwelling Pokémon, but when evolution draws near, Remoraid travels downstream from rivers.
The Gunfish enemy that appears underwater in Stage 6 of Pulseman bears a resemblance to Remoraid, as they are both combinations of fish and revolver pistols. This may be on purpose due to the fact that Ken Sugimori designed the characters in this game and also designs Pokémon.
If one was to rearrange the Pokérap GS so all the Pokémon are in National Pokédex order, Espeon and Remoraid would remain in its position in the song.
Remoraid's talent for shooting attacks is similar to an archerfish's. Considering its relationship to Mantyke and Mantine, it also appears to be based on a remora. Its shooting abilities, general shape, and appearance make it similar to firearms, more specifically, revolvers.
Remoraid may be a combination of remora and raid (a rapid attack). Alternatively, it could be a combination of remora and aid, denoting the health benefits of some fish that clean others.
Teppouo may be a combination of 鉄砲 teppō (gun, as in water gun) and 魚 uo (fish). 鉄砲魚 teppōuo is also the Japanese name for the archerfish.