Infection rates and infected <i>Symbiodinium</i> cell densities with different inoculated cell densities are shown.

<p>Inoculated <i>Symbiodinium</i> cell densities were low (7 cells/cup = 1 cell/larva = 140 cells/L), medium (70 cells/cup = 10 cells/larva = 1400 cells/L), and high (700 cells/cup = 100 cells/larva = 14,000 cells/L).</p>(a)<p>Infection rates are the average ± SD of triplicate experiments.</p>(b)<p>Infected-cell densities are the average ± SE in infected larvae.