Hydrozoan
Class Name
Hydrozoa
Size
Polyps rarely more than a few centimeters, with blue bottles and Portugese Man O'Wars the exceptions.
Characteristics
-
Most have complex life cycles with polyp & medusa stages
-
Medusa stage usually has inwards fold at bell opening
-
May be solitary or colonial
-
Polyps lack internal septae
Threats
None known
Did you know?
A blue bottle primary tentacle can trail as far as 13m behind the rest of the colony.
Please reload