Porcellio echinatus 'Red Edge' Isopods

A warm red-orange line runs the margin of a grey, lumpy, shark-skin body. That contrast of colour against texture is the whole appeal. This is Porcellio echinatus 'Red Edge', an Iberian isopod also sold as the "Red Edge Shark Skin", and it takes the famously granulated, bumpy exoskeleton of the species and trims it in warm red to orange along the segments and skirt. The name echinatus points straight at that spiny, roughened texture, and the standard Shark Skin shows the same sculpted body without the coloured margin.

Up close the body reads as rough and prehistoric, a landscape of raised bumps that catches the light quite differently from the smoother Porcellio. Along every segment and around the skirt runs that red-to-orange edging, and in good light the margins can pick up silvery highlights that lift the whole animal. These are medium isopods at roughly 12 to 18mm, so there is enough size to appreciate the detail without needing a colony of giants. Like all Porcellio, they cannot conglobate: there is no rolling into a ball here. They are flat-bodied and rely on speed and on wedging into tight crevices to keep themselves safe.

They earn their place because they pair that distinctive look with easy, forgiving care. This is a hardy, beginner-friendly species that establishes quickly and works hard as a detritivore, grazing down leaf litter and decaying wood to keep a bioactive setup ticking over. They are also surface-active and happy to be seen, so they double as a display animal rather than hiding away like some Porcellio. If you are building a textured cluster, they sit naturally beside the smoother, classic Porcellio scaber Mix and the large, prolific Dairy Cow, and you can compare the whole genus in the Porcellio collection.

Care is straightforward. Keep them at ordinary room temperature, somewhere between 18 and 25°C, which suits most UK homes year round. Aim for moderate humidity around 60 to 70% and build a clear gradient into the enclosure, with one damp end and one drier end rather than a uniformly wet box. Give them medium to good ventilation to keep the air fresh, and lay down a reasonably deep substrate topped with cork bark and plenty of leaf litter; a nutritious base such as flake soil gives them something to burrow into and graze, and hardwood leaves like magnolia make excellent long-lasting cover and food. Keep a calcium source available at all times for clean moults, and because Porcellio are protein-hungry, offer a little protein regularly alongside the leaf litter and the odd piece of vegetable.

Given that steady setup, the Red Edge is a reliable breeder that establishes well and builds at a measured pace. Females carry their young in a marsupium and release fully formed juveniles, and a larger starter group will settle faster and give you better genetic diversity from the outset. The granulation and the coloured margins develop as the youngsters mature, so a young colony grows into its looks over successive moults. A thriving springtail culture is worth adding to any tub, since springtails deal with mould and microbial growth at a scale the isopods cannot, especially around protein foods and the damp end of the gradient.

Every colony leaves us captive-bred and carefully packed, settled around a ventilated tub of damp sphagnum inside a double-walled box to keep them stable in transit. We dispatch Monday to Thursday by tracked next-day Royal Mail for delivery by 1pm, every order carries our live-arrival guarantee, and we always include a 20% overcount as standard.