text:  And it's affecting oysters, abalone, shrimp, and fin fish. Wyban presented the preliminary results during a NELHA board of directors meeting in May. The state agency manages the Kailua-Kona Aquaculture Park. Wyban says there are two likely causes. One is biofouling, or the release of chemicals into the park's water pipes. Or it could be a bacteria known as Vibrio. But it's not really clear what the issue is. Greg Barber is NELHA's executive director.