Possible Clues:

• Starfish's cousin
• Shelled marine creature
• 4 huntin' round university
• Main thing, lookin' to store uranium
• The main thing is to look round top of unit at home
• Marine creature's bad cold - sun, I hear, needed
• Initially uninterested in lookin' for marine creature
• Might it be the cabin boy that's so prickly?
• For all to see in burn, feature which prefers salt water
• Chain-user - nasty prickly little creature