Not sure if you are heading in this direction...but Sea Pens are often referred to as "PENS." A grouping of this type of "PEN" is called a colony. There is lots of info out there...but this link is the most precise:
Return to FunTrivia
"Ask FunTrivia" strives to offer the best answers possible to trivia questions. We ask our submitters to thoroughly research questions and provide sources where possible. Feel free to post corrections or additions. This is server B184.