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animal
biology
copepods
crustaceans
cyclops
dangerous
disease
ecosystem
education
environment
fauna
fleas
freshwater
habitat
infection
internal
investigating
invisible
lab
laboratory
larvae
life
magnification
male
micro
microbiology
microorganism
microscope
microscopic
nauplii
organism
organs
parasite
parasitic
pond
probe
protozoa
research
science
scientific
specimen
structure
swimming
tiny
transparent
water
wildlife