Tidal Whale

Duff McWhalen (also known as "Tidal Makkoeen (Whale)") was an old sea Maverick Hunter before being infected by the Sigma Virus. He shoots out blocks of what appears to be ice. The C-Shot and C-Sword cut through these, and also damage McWhalen well, as it is his weakness. Duff guards the ocean, which has the Hydrogen necessary for the Enigma laser.

It should be noted that Duff McWhalen's stage music is a remix of Bubble Crab's level music way back in Mega Man X2.