Cupraiad: Nothing changed from original sub, Cuprum+Naiad
Crusilvis: This one is one of those ideas that you wake up in the middle of the night with. Cru comes from the holy knights the Crusaders. Silver is the english name for silver (duh). Alternatively, you could see Cru- as crux, which is a synonym for cross, to go with the Biblical theme.
Sharpedo doesn't have a tail because if it did, it would be the second coming of Garchomp. That's why Game Freak chopped off 1/2 of my favorite shark
PS main alt: MasterSword596/SkywardSword596