Related Clues:

• Shoe for swimming
• -- fin, found on a fish's back
• Shark's back fin
• Limb of a seal
• __ fin (fish feature)
• ___ fin (shark part)
• Fin on the back of marine vertebrates
• Fin descriptor
• Along the back
• Member of the seal family?
• Swimming shoe
• To do with a fin on a fish
• A lord’s leaping around at the back
• Like a spiny dogfish’s spines
• Pinball machine part