These O. briareus eggs were all laid at the same time. The larger egg in the center was kept at 5 degrees warmer than the surrounding eggs. The embryo of O. briareus starts at the rounded, or distal, end of the egg. As it matures, it then moves to the stalk end of the egg (as shown by the surrounding less developed eggs). Then prior to hatching, the embyo will flip to its original orientation at the distal end of the egg.
Maturity: Egg; Lab or Wild: Lab; Origin: Florida keys caribbean atlantic ocean