Cnidome Descriptions

• Life History Stages

• Body Regions

Life History Stages Descriptions

Life History Stage	Description
Adult Polyp	Usually a sessile stage the adult polyp typically is tubular or cylindrical, with the oral end (mouth & tentacles) facing upward with aboral end attached.
Bud	Asexually-produced progeny that either remains attached to the parent as a colonial zooid or undergoes differentiation before being released as a separate individual.
Fission	Asexual reproduction by division of the body into two or more parts with each part forming its own individual organism.
Larva	An independent, motile, developmental stage that typically is just barely visible to the naked eye and looks different from the adult.
Medusa	Generally a free-swimming stage, the medusoid body is bell-like with the rounded outside end facing upward and the mouth located in the center of the concave undersurface. The tentacles hang down from the outside of the bell.
Regeneration	This is the generic life history stage for any animal that is in the process of restoring its natural form as a result of injury or laceration.
Regeneration (lower-head-forming)	This is the stage of the lower half of an animal that has been split in two. In this animal the foot has been preserved but the head is missing. The region where the animal was cut should be in the process of reforming a new head.
Regeneration (lower-head-forming)(horizontal beneath tentacles)	Essentially the same as "Regeneration (lower-head-forming)", but the position of the cut (just below the tentacles) is important to the experiment.
Regeneration (lower-head-forming)(horizontal mid-body column)	Essentially the same as "Regeneration (lower-head-forming)", but the position of the cut (mid-body column) is important to the experiment.
Regeneration (upper-foot-forming)	This is the stage of the upper half of an animal that has been split in two. In this animal the head has been preserved but the foot is missing. The region where the animal was cut should be in the process of reforming a new foot.
Regeneration (upper-foot-forming)(horizontal beneath tentacles)	Essentially the same as "Regeneration (upper-foot-forming)", but the position of the cut (just below the tentacles) is important to the experiment.
Regeneration (upper-foot-forming)(horizontal mid-body column)	Essentially the same as "Regeneration (upper-foot-forming)", but the position of the cut (mid-body column) is important to the experiment.

Body Regions

Body Regions	Description
Apical Tip
Body Column
Budding Zone
Foot
Gastric Region
Head
Hypostome
Hypostome - Around Mouth
Peduncle
Tentacle
Tentacle Root
Tentacle Zone
Regenerating Tip