A post to remember a group of organisms usually (even justifiably) hated blood, not just united by ties of kinship (can be single-celled or multicellular plants and animals, vertebrates and invertebrates) from the way of life based on obtaining food and other resources to the detriment of other organizations: I'm talking about parasites. I always had a love-hate relationship towards this vast jumble: one is rotten hypochondriac, the mere sight of offal and diseases in photography gives me an effort, and the bites of mosquitoes and horseflies summer, plus a few assault ticks make me try to screw the common hatred of opportunistic nature, they are bloodsucking insects (bloodsucker) or nematode worms that burrow their way into the living bodies of victims. The other pests are one of the most shining examples of what you can do the evolution, and how far it is willing to push their lives to grab what little resources to enable it to continue to exist. After all, some of these beings have chosen the most extreme habitats of all, the place from which all other bodies are trying to stay away: the stomach of another animal. To survive according to their specialization (internal or external, or immovable property, bloodsucking, flesh-eating or food already digested) and their phylum (arthropods, nematodes, flatworms, strings ...) these things have also developed a set of tools and incredibly interesting life cycles. They also have a key role in the ecosystem, comprising of specific species or by acting as prey for others, and recently ecologists have begun to realize that a healthy ecosystem must be healthy populations of parasites.
Incidentally, the image captures a crustacean isopods that used to anchor the base of the tongue of the fish by blocking blood flow, the language dies in the short and detached, but the fish can always continue to use the isopods instead of it, in order to lead a normal life and long (as it will, therefore, that dell'isopode). Nature can sometimes be a psychopathic son of a bitch.
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