Related Clues:

• It lacks a pelvic fin
• Anguilliform creature
• Snaky critter
• Sinuous swimmer
• Slimy creatures
• Sigmoid swimmers
• 'The Little Mermaid' baddies
• Sashimi fish
• Stunning swimmers
• Slippery sort
• Sniggling catches
• Fish lacking pelvic fins
• Epitome of slipperiness
• Thing in the sea
• Lithe swimmer