Related Clues:

• Seuss' Yertle
• Flow like mud
• Goop's movement
• One in a shell
• Creepy one?
• Get through slowly
• Move like sludge
• Move like goo
• Shelled creature
• Leak out slowly
• He may stick his neck out
• Aquarium cleaner
• Swamp goo
• Seep out slowly
• Antenna holder?