•First discovered in Tampa area power plant intakes July 1999
•Cultured intensively in Thailand and Philippines for food
•Probable ballast
•   water introduction
•  
•   Surviving in cooler
•   temperatures
•   Reproducing and spreading out of the bay
•
•
•  
Perna viridis
To summarize : They were first discovered in a Tampa area power plant July 1999.
They are intensively cultured in Thailand and the Philippines.
They are probably a ballast water introduction.
They are reproducing and spreading out of the bay.