Snails are mollusks
Nature's Wonder
"The Snail's Journey: A Look into Gastropod Life"
"Nature Pathway: A Journey Through the Wild"
Mollusks For Childs | Learn all about these land and sea dwellers
Globepedia
Marsh Rams-Horn
SuttonCreek Productions
Adult liver fluke (Fasciola hepatica) on the surface of a freshly-killed sheep liver.
TalkToTheBody
Adult liver fluke (Fasciola hepatica)
Parasite Video Archive
How to Treat Sick aquarium Fish with the Quarantine Medication Trio
fish-O-line
What are common fish diseases and their symptoms?
fish-O-line