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.
So, although you can keep hermit crabs, you need to be selective about which species you purchase. Letâs start with the undesirable species first. One species that should definitely be avoided is the red hairy or white spotted hermit crab (Dardanus megistos). This species is voracious, and attains a length of about 4 inches. Although it can be housed with larger fish, I would avoid placing it in a tank with any fish less than four or five times its size.