Write the characteristics of a polyp (hypostome) animal.

(N/A) The polyp form is a sessile and cylindrical body form found in the phylum $Cnidaria$.
Key characteristics include:
$1$. Body Shape: It has a cylindrical body shape.
$2$. Lifestyle: It is a sessile form,meaning it remains attached to a substrate.
$3$. Mouth Position: The mouth is directed upwards and is surrounded by tentacles.
$4$. Examples: Common examples include $Hydra$ and $Adamsia$ (sea anemone).
$5$. Reproduction: It typically reproduces asexually by budding.