<div class="views-field views-field-field-product-summary tb" style="color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium;"> <div class="field-content"> <p>The Emerald Crab will feed on algae including bubble algae  and eat any left-over meaty foods but, if it is underfed, may consume coral polyps or small fish. Research has shown that it can be used to control excessive growth of bubble algae in aquaria, but best results are found when its diet is supplemented with mysids but not with pelleted food.</p> </div> </div> <p> </p>