Fish Skull (IMAGE) University of Massachusetts Amherst Caption Pink areas are bone and blue areas are cartilage in this head skeleton of a larval fish. Craig Albertson of UMass Amherst and a colleague report on experiments that looked at how a gaping behavior, a factor in the fish larvae's developmental environment that precedes bone formation, influences later development of cranio-facial bones. Credit UMass Amherst 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.