<p>Blooms of <span class="taxon"><em>Chrysaora quinquecirrha</em></span> negatively impact humans. Economically, these large masses of jellies deter swimmers, beach goers, and tourists from entering the water. If one comes in physical contact with the Atlantic sea nettle, thousands of stinging nematocysts on tentacles penetrate toxins into the skin, causing a painful rash.</p>  <p><strong>Negative Impacts: </strong>Injures Humans; Injures Humans :: bites or stings; Injures Humans :: venomous</p>