Leptopoma perlucidum 
Leptopoma sericatum 
Leptopoma undatum 
Lettuce sea slug 
Levantina caesareana 
Levantina spiriplana 
Levantine Field Snail 
Lewis's moon snail 
Lilliput longarm octopus 
Lima quantoensis 
Limaeus 
Limecola balthica 
Limenandra barnosii 
Lined chiton 
Lined Cratena 
Lined Nembrotha 
Lined sea hare 
Lioconcha castrensis 
Lion Nudibranch 
Lissachatina fulica 
Lithophaga litophaga 
Little Egg Cowry 
Little flying squid 
Littorina plena