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    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans. — Stock Photo
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans.
    Octopus at produce market on background, close up — Stock Photo
    Octopus at produce market on background, close up
    Illustration of ascariasis worm on black background. — Stock Photo
    Illustration of ascariasis worm on black background.
    Sea fans and whips on reef — Stock Photo
    Sea fans and whips on reef
    Broadclub cuttlefish on diverse reef — Stock Photo
    Broadclub cuttlefish on diverse reef
    Close-up of entomopathogenic fungus spores spreading from fly abdomen. — Stock Photo
    Close-up of entomopathogenic fungus spores spreading from fly abdomen.
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Soft coral colonies growing on reef — Stock Photo
    Soft coral colonies growing on reef
    Discodoris nudibranch closeup shot — Stock Photo
    Discodoris nudibranch closeup shot
    Jewel bugs metallic shield bugs — Stock Photo
    Jewel bugs metallic shield bugs
    Gymnodoris ceylonica nudibranch in Beqa Lagoon — Stock Photo
    Gymnodoris ceylonica nudibranch in Beqa Lagoon
    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.
    House dust mite — Stock Photo
    House dust mite
    Parasitic adult Ticks — Stock Photo
    Parasitic adult Ticks
    Close-up of black leaf beetle on piece of lichen-covered branch. — Stock Photo
    Close-up of black leaf beetle on piece of lichen-covered branch.
    Close-up of three starfish on rocks in the ocean, Indonesia — Stock Photo
    Close-up of three starfish on rocks in the ocean, Indonesia
    Yellow and brown headshield slug — Stock Photo
    Yellow and brown headshield slug
    France, Les Moutiers-en-Retz, 44, barnacles hanging on a beacon stranded on the beach after a storm. — Stock Photo
    France, Les Moutiers-en-Retz, 44, barnacles hanging on a beacon stranded on the beach after a storm.
    Parasitic louse on human head skin, digital illustration. — Stock Photo
    Parasitic louse on human head skin, digital illustration.
    Parasitic nematode worm — Stock Photo
    Parasitic nematode worm
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Front view of a Tufted Spiny Lobster (Panulirus penicillatus) showing its tufted legs that was photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Front view of a Tufted Spiny Lobster (Panulirus penicillatus) showing its tufted legs that was photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America
    House dust mites — Stock Photo
    House dust mites
    Close-up of marmalade hoverfly perched on thin branch. — Stock Photo
    Close-up of marmalade hoverfly perched on thin branch.
    Closeup view of Long horned or Orb-weaver spider on the web, selective focus — Stock Photo
    Closeup view of Long horned or Orb-weaver spider on the web, selective focus
    Oursins are cooked on fire, Hog island, Grenada, West Indies — Stock Photo
    Oursins are cooked on fire, Hog island, Grenada, West Indies
    Beekeeper during work — Stock Photo
    Beekeeper during work
    Soft coral and sea fan — Stock Photo
    Soft coral and sea fan
    Light micrograph of liver fluke eggs in a fish fin. — Stock Photo
    Light micrograph of liver fluke eggs in a fish fin.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Sea star in Beqa Lagoon — Stock Photo
    Sea star in Beqa Lagoon
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Polished sectioned ammonite fossil on black background. — Stock Photo
    Polished sectioned ammonite fossil on black background.
    Top view of round pink barrel sponge, Cenderawasih Bay, West Papua, Indonesia — Stock Photo
    Top view of round pink barrel sponge, Cenderawasih Bay, West Papua, Indonesia
    Grizzled skipper sitting on dried wild plant. — Stock Photo
    Grizzled skipper sitting on dried wild plant.
    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.
    Scabies mite or Sarcoptes scabei — Stock Photo
    Scabies mite or Sarcoptes scabei
    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
    Front view of a Tufted Spiny Lobster (Panulirus penicillatus) showing its tufted legs that was photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Front view of a Tufted Spiny Lobster (Panulirus penicillatus) showing its tufted legs that was photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America
    House dust mite — Stock Photo
    House dust mite
    Close-up of beet weevil insect detailed portrait. — Stock Photo
    Close-up of beet weevil insect detailed portrait.
    Glowing coral reef in ocean — Stock Photo
    Glowing coral reef in ocean
    Blood sucking common Bedbug — Stock Photo
    Blood sucking common Bedbug
    Close-up of butterfly Zebra — Stock Photo
    Close-up of butterfly Zebra
    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
    Ecosystem of reef life under blue ocean — Stock Photo
    Ecosystem of reef life under blue ocean
    Close-up of dew covered tiny fly on frozen leaf covered with ice crystals. — Stock Photo
    Close-up of dew covered tiny fly on frozen leaf covered with ice crystals.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Mother using lice comb on daughter hair in bathroom — Stock Photo
    Mother using lice comb on daughter hair in bathroom
    Northern scorpion in defensive posture, close-up. — Stock Photo
    Northern scorpion in defensive posture, close-up.
    Sally lightfoot crab — Stock Photo
    Sally lightfoot crab
    Close-up of small heat butterfly hanging on dried stem. — Stock Photo
    Close-up of small heat butterfly hanging on dried stem.
    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
    Close-up of grass moth sitting on grass spike. — Stock Photo
    Close-up of grass moth sitting on grass spike.
    Pattern of giant sea cucumber — Stock Photo
    Pattern of giant sea cucumber
    Empid fly on frozen branch covered with ice crystals. — Stock Photo
    Empid fly on frozen branch covered with ice crystals.
    Spearing mantis shrimp in burrow — Stock Photo
    Spearing mantis shrimp in burrow
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Close-up of dragonfly perched on dried wild plant. — Stock Photo
    Close-up of dragonfly perched on dried wild plant.
    Female copepod with eggs — Stock Photo
    Female copepod with eggs