Ramses = high yellow
Berylium looks like an albino of some sort - probably tremper like katie says but a good clear eye shot is needed to say for sure
Nitrogen looks like a Murphy's patternless
Other three look like tangs.
Berylium's tail was eaten off by Lithium and the rest of them were bought with their tails like you see. Thanks for the morph assessments! Berylium's head is what was kind of puzzling me the most- looks like lava cracks. His eyes are light yellow so I do know he's some sort of albino. The Doctor has silverish borders on the rim of his eye.