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    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork. — Stock Photo
    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork.
    Close-up of leaf hopper nymph on thin yellow plant stem. — Stock Photo
    Close-up of leaf hopper nymph on thin yellow plant stem.
    Delicate tunicate amid soft corals — Stock Photo
    Delicate tunicate amid soft corals
    Pair of spiny tiger shrimps — Stock Photo
    Pair of spiny tiger shrimps
    Close-up of bag worm moth larval sac covered with twigs. — Stock Photo
    Close-up of bag worm moth larval sac covered with twigs.
    Mosquito of family Culicidae — Stock Photo
    Mosquito of family Culicidae
    Stomach infected with parasitic nematode worms — Stock Photo
    Stomach infected with parasitic nematode worms
    Close-up of flesh fly perched on dried wild plant. — Stock Photo
    Close-up of flesh fly perched on dried wild plant.
    Two ants standing head to head in Malaysia — Stock Photo
    Two ants standing head to head in Malaysia
    Land snail crawling on green leaf, close-up — Stock Photo
    Land snail crawling on green leaf, close-up
    Soft coral seascape — Stock Photo
    Soft coral seascape
    Broadclub cuttlefish in dark water — Stock Photo
    Broadclub cuttlefish in dark water
    Digital illustration of nit egg of human head louse attached to human hair. — Stock Photo
    Digital illustration of nit egg of human head louse attached to human hair.
    Close-up of thick legged hoverfly on dried wild plant. — Stock Photo
    Close-up of thick legged hoverfly on dried wild plant.
    Discodoris nudibranch closeup shot — Stock Photo
    Discodoris nudibranch closeup shot
    Close-up of small copper butterfly covered by dew drops on wild plant. — Stock Photo
    Close-up of small copper butterfly covered by dew drops on wild plant.
    Close-up of tachinid fly sitting on wild plant. — Stock Photo
    Close-up of tachinid fly sitting on wild plant.
    Six spot burnet moth sitting on Fullers teasel. — Stock Photo
    Six spot burnet moth sitting on Fullers teasel.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Coloured scanning electron micrograph of tardigrade water bear. — Stock Photo
    Coloured scanning electron micrograph of tardigrade water bear.
    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork. — Stock Photo
    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork.
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation — Stock Photo
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation
    Echinococcosis multilocularis hydatid cyst, computer illustration — Stock Photo
    Echinococcosis multilocularis hydatid cyst, computer illustration
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Agriculture - Pest insect, Katydid (Microcentrum spp.) adult frontal view. — Stock Photo
    Agriculture - Pest insect, Katydid (Microcentrum spp.) adult frontal view.
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasite causing ulcer in intestinal tract. — Stock Photo
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasite causing ulcer in intestinal tract.
    Close up of Bushman holding scorpion,Botswana — Stock Photo
    Close up of Bushman holding scorpion,Botswana
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph. — Stock Photo
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph.
    Sea spider, fuerteventura canary islands — Stock Photo
    Sea spider, fuerteventura canary islands
    Spearing mantis shrimp in burrow — Stock Photo
    Spearing mantis shrimp in burrow
    Halgerda batangas sea slug — Stock Photo
    Halgerda batangas sea slug
    Chromodoris kuniei nudibranch in Beqa Lagoon — Stock Photo
    Chromodoris kuniei nudibranch in Beqa Lagoon
    Demodex eyelash mite — Stock Photo
    Demodex eyelash mite
    Close-up of orange knee sawfly beetle on plant stem. — Stock Photo
    Close-up of orange knee sawfly beetle on plant stem.
    Zebra crab on fire coral — Stock Photo
    Zebra crab on fire coral
    Marine biodiversity with colorful sea of coral reef in tropical clear water — Stock Photo
    Marine biodiversity with colorful sea of coral reef in tropical clear water
    Common house dust mite — Stock Photo
    Common house dust mite
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa). — Stock Photo
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa).
    Anemone hermit crab on coral — Stock Photo
    Anemone hermit crab on coral
    Male praying mantis eating — Stock Photo
    Male praying mantis eating
    Hypselodoris bullocki nudibranch crawling on reef — Stock Photo
    Hypselodoris bullocki nudibranch crawling on reef
    Close-up of marbled skipper moth on dried wildflower. — Stock Photo
    Close-up of marbled skipper moth on dried wildflower.
    Chef preparing a crab. — Stock Photo
    Chef preparing a crab.
    Folded sea slug nudibranch — Stock Photo
    Folded sea slug nudibranch
    Parachuting mimic octopus — Stock Photo
    Parachuting mimic octopus
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    White snail akhatina crawls on the nose of a woman — Stock Photo
    White snail akhatina crawls on the nose of a woman
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    Digger bee (Habropoda sp.) sleeping on a branch. Its turquoise compound eyes are visible here. — Stock Photo
    Digger bee (Habropoda sp.) sleeping on a branch. Its turquoise compound eyes are visible here.
    Gymnodoris ceylonica nudibranch in Beqa Lagoon — Stock Photo
    Gymnodoris ceylonica nudibranch in Beqa Lagoon
    Beekeeper with blue gloves holding a bee — Stock Photo
    Beekeeper with blue gloves holding a bee
    Black-margined nudibranch on white — Stock Photo
    Black-margined nudibranch on white
    Coloured scanning electron micrograph (SEM) of a tardigrade (Macrobiotus sp.), or water bear. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a tardigrade (Macrobiotus sp.), or water bear.
    Camouflaged praying mantis sitting on dried branch. — Stock Photo
    Camouflaged praying mantis sitting on dried branch.
    Colorful sea anemone with anemonefish — Stock Photo
    Colorful sea anemone with anemonefish
    Bluish white transluscent jellyfish — Stock Photo
    Bluish white transluscent jellyfish
    Phidiana indica nudibranch on purple sponge — Stock Photo
    Phidiana indica nudibranch on purple sponge
    Risbecia tryoni nudibranch — Stock Photo
    Risbecia tryoni nudibranch