A family of parasitic flatworms that have spiny mouths and infect the intestines of vertebrates, including birds, reptiles, and mammals.
From Greek 'echinos' (spiny) + 'stoma' (mouth) + Latin '-idae' (taxonomic family suffix). The name describes the characteristic spine-rimmed oral opening these parasites possess.
These worms are actually responsible for a disease called echinostomiasis that affects humans who eat undercooked freshwater snails or plants—it's like a tiny spiky gate-crasher that forces its way into your intestines!
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