animal
brown
calcium
carbonate
clam
conch
creature
crustacean
design
effect
eternity
evolution
garden
gastropod
gooey
invertebrate
life
macro
marine
movement
mucus
nature
parasite
prehistoric
primitive
seashell
shell
slime
slimy
slip
slippery
slowness
snail
snorkeling
speed
spiral
start
sticky
tropical
univalve
water