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.
It's often thought that hermit crabs live only a few years, but that doesn't have to be the case. With proper care and diet, some species of hermit crabs can live up to 30 years. In captivity, they do not have the same predatory threats they would have in nature -- so pet hermit crabs can live even longer.