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    Encrusting sponges (Phylum Porifera) in a multitude of colors corresponding to different taxa (Orange Hydroid Sponge: Timea sp., Vermilion Clathria: Clathria sp., Yellow Hyrtios: Dactylospongia sp., and Green Encrusting Sponge: Batzella sp.) line the — Stock Photo
    Encrusting sponges (Phylum Porifera) in a multitude of colors corresponding to different taxa (Orange Hydroid Sponge: Timea sp., Vermilion Clathria: Clathria sp., Yellow Hyrtios: Dactylospongia sp., and Green Encrusting Sponge: Batzella sp.) line the
    A male Bullethead Parrot (Chlororus sordidus) biting into turf algae forage growing on volcanic rock substrate adjacent to Lobe Coral (Porites lobata) at Molokini Crater which is located offshore of Maui; Molokini Crater, Maui, Hawaii, United States — Stock Photo
    A male Bullethead Parrot (Chlororus sordidus) biting into turf algae forage growing on volcanic rock substrate adjacent to Lobe Coral (Porites lobata) at Molokini Crater which is located offshore of Maui; Molokini Crater, Maui, Hawaii, United States
    Stick insect foot — Stock Photo
    Stick insect foot
    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 a Crown-of-Thorns Starfish (Acanthaster planci) that was photographed while scuba diving the Kona coast, the Big Island, Hawaii; The Crown-of-Thorns is notorious for eating corals; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Close-up of a Crown-of-Thorns Starfish (Acanthaster planci) that was photographed while scuba diving the Kona coast, the Big Island, Hawaii; The Crown-of-Thorns is notorious for eating corals; Island of Hawaii, Hawaii, United States of America
    Tapeworms infestation in human intestine, digital illustration. — Stock Photo
    Tapeworms infestation in human intestine, digital illustration.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Echinococcus granulosus hydatid cyst, computer illustration — Stock Photo
    Echinococcus granulosus hydatid cyst, computer illustration
    Bee pollinating flowers, close-up view — Stock Photo
    Bee pollinating flowers, close-up view
    Stick insect foot — Stock Photo
    Stick insect foot
    Human head louse on human hair — Stock Photo
    Human head louse on human hair
    Coloured scanning electron micrograph (SEM) of Pediculus humanus capitis, human head lice. P. humanus is divided into two subspecies; the head louse P. humanus capitis and the body louse P. humanus corporis — Stock Photo
    Coloured scanning electron micrograph (SEM) of Pediculus humanus capitis, human head lice. P. humanus is divided into two subspecies; the head louse P. humanus capitis and the body louse P. humanus corporis
    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
    Earthworm coloured scanning electron micrograph — Stock Photo
    Earthworm coloured scanning electron micrograph
    Close-up of Antler Coral (Pocillopora grandis) revealing individual coral polyps which are green from endosymbiotic zoothanthellae (Symbiodinium sp.). This coral head is located on Haloha Reef which is located just off Maui; Maui, Hawaii, United Stat — Stock Photo
    Close-up of Antler Coral (Pocillopora grandis) revealing individual coral polyps which are green from endosymbiotic zoothanthellae (Symbiodinium sp.). This coral head is located on Haloha Reef which is located just off Maui; Maui, Hawaii, United Stat
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    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
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    Shells of unidentified sea snails, full frame. — Stock Photo
    Shells of unidentified sea snails, full frame.
    Light micrograph of single-celled Amoeba engulfing protozoan Paramecium. — Stock Photo
    Light micrograph of single-celled Amoeba engulfing protozoan Paramecium.
    Echinococcus granulosus hydatid cyst, computer illustration — Stock Photo
    Echinococcus granulosus hydatid cyst, computer illustration
    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
    Parasitic head louse on human hair — Stock Photo
    Parasitic head louse on human hair
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Thanks to cryptic coloration, this Commerson's Frogfish (Antennarius commerson) blends-in well next to the Mound Coral (Porites lutea) that it is perched on waiting to ambush prey on the Kona coast, the Big Island; Island of Hawaii, Hawaii, United St — Stock Photo
    Thanks to cryptic coloration, this Commerson's Frogfish (Antennarius commerson) blends-in well next to the Mound Coral (Porites lutea) that it is perched on waiting to ambush prey on the Kona coast, the Big Island; Island of Hawaii, Hawaii, United St
    Echinococcosis multilocularis hydatid cyst, computer illustration — Stock Photo
    Echinococcosis multilocularis hydatid cyst, computer illustration
    Banded sea urchin (Echinothrix calamaris) on a reef off the Kona coast, the Big Island; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Banded sea urchin (Echinothrix calamaris) on a reef off the Kona coast, the Big Island; Island of Hawaii, Hawaii, United States of America
    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
    Microfilaria worms in blood — Stock Photo
    Microfilaria worms in blood
    Close up of fly affected by the zombie fungus entomophthora muscae — Stock Photo
    Close up of fly affected by the zombie fungus entomophthora muscae
    Freckled Hawkfish (Paracirrhites forsteri) resting on finger coral (Porites compressa) photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Freckled Hawkfish (Paracirrhites forsteri) resting on finger coral (Porites compressa) photographed while scuba diving the Kona Coast; Island of Hawaii, Hawaii, United States of America
    3d illustration of a schistosome fluke (Schistosoma mansoni) — Stock Photo
    3d illustration of a schistosome fluke (Schistosoma mansoni)
    Weevil (Sitophilus sp.), coloured scanning electron micrograph (SEM). This weevil is a major agricultural pest. It primarily attacks stored grains and fruits, feeding on them with its often elongated snout, or rostrum — Stock Photo
    Weevil (Sitophilus sp.), coloured scanning electron micrograph (SEM). This weevil is a major agricultural pest. It primarily attacks stored grains and fruits, feeding on them with its often elongated snout, or rostrum
    Dog roundworm parasite — Stock Photo
    Dog roundworm parasite
    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.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Echinococcosis multilocularis hydatid cyst, computer illustration — Stock Photo
    Echinococcosis multilocularis hydatid cyst, computer illustration
    Tapeworms infestation in human intestine, digital illustration. — Stock Photo
    Tapeworms infestation in human intestine, digital illustration.
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    Cat flea. Coloured scanning electron micrograph (SEM) of a cat flea (Ctenocephalides felis). Its body is laterally-flattened to allow it to move easily through the fur of its cat host — Stock Photo
    Cat flea. Coloured scanning electron micrograph (SEM) of a cat flea (Ctenocephalides felis). Its body is laterally-flattened to allow it to move easily through the fur of its cat host
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Close up of fly affected by the zombie fungus entomophthora muscae — Stock Photo
    Close up of fly affected by the zombie fungus entomophthora muscae
    Parasitic adult Ticks — Stock Photo
    Parasitic adult Ticks
    An Ornate Butterflyfish (Chaetodon ornatissimus) swims over Finger and Lobe corals (Porites compressa and P. lobata) at Haloha Reef off Maui; Maui, Hawaii, United States of America — Stock Photo
    An Ornate Butterflyfish (Chaetodon ornatissimus) swims over Finger and Lobe corals (Porites compressa and P. lobata) at Haloha Reef off Maui; Maui, Hawaii, United States of America
    Naegleria brain-eating amoeba forms, digital illustration — Stock Photo
    Naegleria brain-eating amoeba forms, digital illustration
    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
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (blue) and jaws. Magnification: x50 when printed 10 centimetres wide. — Stock Photo
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (blue) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Echinococcus granulosus hydatid cyst, computer illustration — Stock Photo
    Echinococcus granulosus hydatid cyst, computer illustration
    Echinococcus granulosus hydatid cyst, computer illustration — Stock Photo
    Echinococcus granulosus hydatid cyst, computer illustration
    Digital illustration of parasitic Ancylostoma duodenale hookworms. — Stock Photo
    Digital illustration of parasitic Ancylostoma duodenale hookworms.
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms. — Stock Photo
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms.
    Adult dust mite — Stock Photo
    Adult dust mite
    Parasitic Tick feeding — Stock Photo
    Parasitic Tick feeding
    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.
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Egg of a parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Egg of a parasitic worm Trichuris trichiura, computer illustration
    Egg of a parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Egg of a parasitic worm Trichuris trichiura, computer illustration
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration