Halloween hermit crab It is native to the Indo-Pacific region, including the Red Sea and Hawaii. It is very similar in appearance to three other species in the same genus: "C. tricolor", "C. vakovako" and "C. galzini", only distinguishable by the color of its striae. The halloween hermit crab will grow on average to in length, which is fairly large in comparison to other hermit crabs. It has a noticeably flattened pure white shield, approximately long. It is a nocturnal species, and has been described as "conspicuous". It lives primarily in empty cone shells, mainly those of snails or tritons. Like other hermit
Social spider but this is a rare event and has not been studied sufficiently to quantify for any social spider species. Females can also out-number males as much as 10:1 in many species; this too acts as a genetic bottleneck and further decreases the genetic variation of the species. Species include: Social spider A social spider is a spider species whose individuals form relatively long-lasting aggregations. Whereas most spiders are solitary and even aggressive toward other members of their own species, some hundreds of species in several families show a tendency to live in groups, often referred to as colonies. Most species