The troubling deaths, scientists say, could foreshadow ecological disaster. The decline is real. There's just not a lot of hard data to suggest that there is a decline in New England.
Manmade pollution causes the bacteria to grow, which promotes the growth of biotoxins.
When we feed fish these biotoxins, they die. However, more research is needed here. They are important components in ecosystems so their possible loss has ramifications. This is not necessarily a warning sign.