- Hydra oligactis
Taxobox
name = "Hydra oligactis"
image_width = 250px
image_caption =
regnum =Animal ia
phylum =Cnidaria
classis =Hydrozoa
ordo =Hydroida
familia =Hydridae
genus = "Hydra"
species = "H. oligactis"
binomial = "Hydra oligactis"
binomial_authority = Pallas, 1766"Hydra oligactis", also known as the brown Hydra, is a species of hydra found widely dispersed in the northern
temperate zone . It is a common organism found in still waters from early Spring to late Autumn.It is commonly found attached to the stems of water plants, the undersides of leaves , submerged twigs and on the surface of stones. When disturbed it retracts to a small brown blob which is easly overlooked. Gently sweeping through a clean weedy
pond and allowing the collected water and leaves to stand in a jar will often reveal Hydra emerging after only a few minutes.When in feeding mode, the fully extended
tentacle s are very long and may exceed 1 inch (25 mm) in length. In this condition the tentacles are very difficult to see with the naked eye and are often only revealed when aprey animal such asDaphnia is caught.
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