Pfiesteria piscicida then feeds on the weak and exposed skin, blood, and tissue. The fish eventually die not by the invasion of Pfiesteria piscicida, but by suffocation (the toxins cause paralyzation of muscles) or by infection (bacteria and foreign objects can enter the fish through the lesions).
Gaudy is an adjective that means ostentatious — in other words, flashy and in your face, and not in a good way. Someone in a gaudy outfit is probably trying too hard to be cool and stylish. Gaudy evolved from the Middle English gaud “deception, trick” in the 1520's.
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