These Ardentiella "Scarlet" isopods are one of the most sought after isopods for their striking red color and are active during the day. Note that the care for these are a bit more involved as they like to climb, so need some verticality and need mossy bark, good ventilation and humidity. See my youtube videos for my enclosures and care for these isopods: 

Ardentiella Enclosure Set-up

Ardentiella Scarlet FAQ:

Environment: They thrive in habitats that offer humidity and well ventilated. They also need verticality and mossy sticks.

Food of Preference: Mossy Sticks and ezyeddie.com pod nugz

Behavior: Active species during the day - diurnal 

Rarity: Ultra Rares

Care Difficulty: Moderate to Hard