Porcellio Hoffmanseggi is nearly the largest land isopod that exists today. Bested in size only by it's cousin Porcellio Magnificus. Hoffmannseggi isopods are sometimes referred to as "titans" and once you've handled one it's easy to see why. Their antennae can be just as long if not longer than their body length. They are generally a light to medium gray with a nice white edged skirt giving them good visual contrast.
Full grown males on average reach 1.5 inches with females only slightly smaller. With that said, they need generous space. Males can be territorial and an off balance ratio of males to females can result in fighting along with the females being "harrassed" which causes stress and other potential issues. A sterilite gasket sealed bin or glass tank measuring at least 18-24 long by 12 or more inches wide is ideal for a starter colony with some room to grow. Enclosures can be enhanced with natural botanical items to simulate the isopods habitat in the wild. This helps them feel secure which in turn promotes their natural processes like eating and breeding. Thepreferred temperature range for P. Hoffmanseggi is 68-76F.
Moisture gradient and ventilation is where the potential challenging aspect of this species comes into play. They do best in a drier set up than most typical isopods but still need a moist area or two to avoid desiccating. If your set up is large enough, a few different areas that vary in this way can be beneficial. Such as having two separate moist corners and some dry area in between. They will often migrate between moist and dry areas at different times of the day to facilitate their biological processes as needed. A second layer of needs that further makes them a little more involved is that they need medium to high ventilation. This is easiest achieved with an enclosure that has some level of height up and away from the substrate. In the areas that are to be moist, the substrate can be a bit deeper which in turn retains humidity longer. A few pieces of cork bark strategically placed over some of the moist side will also help retain the humidity levels and reduce the frequency of watering needed to maintain a proper moisture gradient. They also seem to appreciate some stacked cork bark which gives them another dimension to regulate their moisture needs by climbing higher away from the substrate.
Isopods are detritivores. Their primary diet in nature is leaf litter and decayed wood. Both of these should always be available in abundance. They will also happily consume any other decomposing organic plant or animal matter they come across. As such it is vital to supplement your isopods with other food sources on a semi regular basis. They enjoy food options like squash, radishes, carrots and other veggies along with commercial isopod powdered food like Repashy. Being a Porcellio, they do appreciate some protein occasionally which can be things like freeze dried minnows, shrimp, fish pellets, dried insects and other protein based food sources. Be sure to feed these on the drier side as they can spoil quickly in humid environments and attract unwanted pests. It should also be noted it's highly recommended to have some form of calcium available at all times. As these unique isopods naturally occur in the limestone caves of eastern Spain, they spend all of their lives in such environments and the closer your set up can mimic their natural surroundings, the better your chance of success.
Hoffs are a rewarding species to keep and never fail to impress with their sheer size. Though they are mostly hidden by day, if you look in on them after the lights have been out for a short time, you will see them fully out and about foraging for food and exploring their surroundings. There are some color variants in the hobby like chocolate, albino and even an orange version! Hoffs do require a little more care and upkeep than some other types but watching your own colony of titans grow and flourish is well worth the effort!
Quick Facts
- Origin: Spain
- Taxonomy: Porcellionidae > Porcellio > P. Hoffmannseggii
- Size: Up to 1.50 inches
- Activity level: Primarily nocturnal
- Difficulty: Intermediate