|Artwork by Capcom
Sea Mine is an enemy from Mega Man 4. It is a land mine repurposed for underwater use.
Sea Mine returned in Make a Good Mega Man Level 2, where it appeared in the entries Cardinal Man, Chomp Man, The Dampening, Lava Factory, and Boil Man, as well as the Wily stages Outer Space, Water Ducts, Inner Sanctum, and Reality Core, the Tier X stage Metallic Ocean, and the Pit of Pits sub-levels "Cold Water" and "Safe Shallows". They also appeared in the Make a Good 48 Hour Mega Man Level entry Short-Tempered Circuit, albeit reskinned as lightbulbs.
Sea Mines will slowly bob up and down, completely immune to all weapons. If Mega Man gets close, there is a chance that they will stop bobbing, begin to flash, and explode shortly afterwards.
The Sea Mines in Boil Man and Water Ducts are guaranteed to flash as soon as Mega Man goes near them; from the Megamix Engine's release onwards, this can be applied to a regular Sea Mine by setting "usesRng = false" in creation code.