Gorfinian

Gorfinian (ゴルフィン星人 Gorufin Seijin?, 37): A Warp Monarch agent from planet Gorfin, he enters the body of Mick the dolphin at the Sea Paradise aquarium to influence the other dolphins with his hyper frequency to attack humans with sound waves. But thanks to Mayu, Mick exorcises the Gorfinian as Gans fights before Tarius and Gorbion arrive and the dolphins use their own hyper frequency to weaken the alien as Gans finishes him off.