This form includes verbal or speech developmental apraxia, perhaps the most common form of the disorder. Constructional apraxia affects the person's ability to draw or copy simple diagrams or to construct simple figures. Oculomotor apraxia is a condition in which patients find it difficult to move their eyes.
Medium ones about the size of a golf ball may molt every four to six months and stay buried for about one to three months. The smaller hermit crabs may molt as often every month or even every few weeks for the tiniest ones, and may stay buried to do it for only a couple of weeks or months.
1 Immediately after the molt, the crab's new shell is pliable and easily stretched. 2  In this condition, the crab is called a soft crab or a soft shell crab. 3  Large amounts of water are consumed prior to and shortly after the molt, causing the soft shell to expand and increase in size. These crabs are called sponge crabs and hatching of the eggs occurs in approximately 2 weeks after the formation of the sponge. 2  Over the two weeks the sponge gradually turns from orange to brown and then black as the larval crabs develop inside the egg.