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.
When eating food, mud crabs use their extremely powerful claws-the larger claw as a âcrusherâ and the smaller claw as a âcutterâ. Mud crabs also use their claws to defend themselves and can even drop a claw to facilitate escape. A new, fully functional claw will grow back in three to four months.Reproduction. The male can only mate with a female while her shell is soft, a period of about 48 hours after moulting.he megalopa later moults into a stage one crab. Stage one crabs are only about 4 mm wide, but frequent moults mean that they grow very quickly. It is thought that wild mud crabs grow to around 10 cm in width in about a year and become sexual mature in about two years.