Ключевые слова: amoeboid motion, anatomy, animals, basal disc, biologists, biology, bud, budding, bulbs, cell, cnida, cnidaria, cnidocytes, education, freshwater, gastrodermis, green, hermaphrodites, hydra, hydramacin, hydroid, hydrozoa, hydrozoans, laboratory, macro, magnification, medusa, microorganism, microscope, microscopic, microscopy, mount, nematocysts, nucleus, organism, ovary, polyp, predator, radially, regeneration, reproduction, science, sedentary, sessile, sticky, structure, symmetric, tentacles, wildlife,