Hydra can be found attached to water-plants, stones etc., with its cylindrical body hanging downwards, with the tentacles gently moving. When disturbed it will rapidly contract into a blob of jelly, making it difficult to find. Hydrae feed on small animals, such as water-fleas. These are caught by structures called nematocysts. There are different typesContinue reading “Budding Hydra, Living”
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Brown Hydra
Hydra can be found attached to water-plants, stones etc., with its cylindrical body hanging downwards, with the tentacles gently moving. When disturbed it will rapidly contract into a blob of jelly, making it difficult to find. Hydrae feed on small animals, such as water-fleas. These are caught by structures called nematocysts. There are different typesContinue reading “Brown Hydra”
Mixed Hydra
Both green and brown in one culture jar for comparative study. One culture is enough for a class of 30 students.
