cyanotoxins
... that cyanotoxins are produced by bacteria which float on lakes and oceans as a green scum and can kill animals by causing respiratory failure?
... that <b id="mwAvM"><a href="./Cyanotoxin" id="mwAvQ" rel="mw:WikiLink" title="Cyanotoxin">cyanotoxins</a></b> are produced by bacteria which float on lakes and oceans as a green scum <i id="mwAvU">(pictured)</i> and can kill animals by causing <a href="./Respiratory_failure" id="mwAvY" rel="mw:WikiLink" title="Respiratory failure">respiratory failure</a>?