Related Clues:

• I caught bird that's pulled up lettuce
• Liner's peril
• Arctic drifter, for short
• Aquatic bird endlessly climbing floating mass of ice
• Mass in the Arctic
• Something coming off the shelf?
• Diving bird caught one coming up, big thing mostly submerged
• Alban ____ based his first opera on an unfinished play by Georg Büchner, and did not complete his second opera
• Current caught diving waterbird coming back - it's seen as a danger to shipping
• Polar bear's perch
• Ice float?
• Small ice field
• The Titanic hit one
• Frozen sea mass
• Titanic mass