Related Clues:

• Unemotional sort
• Student of Zeno
• It's mostly underwater
• It's frozen and floating
• A floating mountain
• Huge mass of frozen water
• Maritime danger, mostly underwater
• Large mass of floating water
• Large floating mass of frozen water
• Floating mountain
• A floating ice mountain
• Unemotional person like chilled water animal
• Mass of floating ice
• Unemotional person of piscine sort
• Type of crisp lettuce