Looking across from upper left to lower right, these are the egg cases of nudibranchs. Each species lays a unique type of egg case. The individual eggs vary in size. Some species’ eggs hatch into miniature versions of the adult nudibranch that immediately settle down to life. Other species’ eggs hatch into a minute shelled stage, called a verliger. Verligers are small enough to be suspended in the water column. They geographically disperse on ocean currents before growing enough to settle down, literally, and transform into fully functioning adults.