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Porcellio Haasi "High Yellow" are among the few terrestrial isopods that reach an impressive sizes as adults with large males reaching 1 to 1.25 inches in length. Males are easily distinguishable having much longer uropods than the females. This species is typically on the shy side and you won't see them out in the open moving about like other isopod species. But once their numbers are up they will be a bit more bold to show themselves periodically. They spend much of their times on the undersides of cork bark, rotting wood and thick leaf litter. Be aware that males are very territorial and your enclosure should have ample space along with multiple hides to minimize conflicts and stress. The bright yellow coloration of these individuals is a line bred trait selectively isolated and is a breath taking sight to see in real life. Originating from the mountainous areas of Spain, these titan sized isopods prefer a drier habitat but still need a damp area to rehydrate from time to time. Quick Facts Origin: Spain Scientific Name: Porcellio Haasi Family: Porcellionidae Morph Name: High Yellow Size: Up to 1.25 inches Activity level: Generally reclusive Difficulty: Intermediate