various types of zooids found in obelia colony
Obelia The polyp colony reproduces asexually. During this stage of life, Obelia are confined to substrate surfaces. On this mature colony there are individual hydranths called gastrozooids, which can be found expanded or contracted, to aid in the growth of this organism by feeding; the reproductive polyp gonozooids has medusa buds. Other hydranths are specialized for defense. The main stalky body of the colony is composed of a coenosarc, which is covered by a protective perisarc.
Cleveland Metroparks Zoo Between 1955 and the transfer of management to the Cleveland Metroparks in 1975, the Zoo experienced rapid expansion despite setbacks due to flooding: the Zoo's reptile collection and several other buildings were lost when Big Creek overflowed in January 1959.[1] Although the Zoo had recovered by 1962, it would not have another permanent reptile collection until the opening of the RainForest thirty years later. Construction began on the Primate & Cat Building in 1975 (the Aquatics section would be added in 1985), later followed by the RainForest in 1992, Wolf Wilderness in 1997, Australian Adventure in 2000, and the Sarah Allison Steffee Center for Zoological Medicine in 2004.[1] The Zoo's official website states that it currently has 3,000 animal residents representing more than 600 different species.[5]