Tateobesu

Tateobesu is a demonic sea monster and a minor villain in Devil May Cry 2.

This fish-like demon It has the ability to become invisible by  assimilating  its body to water, thus causing it to disregard locking-on, but it is still visible to the naked eye in this state.

Lucia encountered this creature in the underwater passages of the underground temple while she and Dante are seperately searching one of the Arcanas.