Limits to Coral Growth (IMAGE) Florida Institute of Technology Caption The flat top of this massive Porites colony off the Palau archipelago, shown here at high tide, reflects the low-water spring tide line that limits its vertical growth. During low tide, the water level would be at the top of the colony. Credit Florida Institute of Technology Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.