Ophistreptus guineensis is the scientific name for the African Giant Chocolate millipede, a large, hardy species native to West Africa that is popular in the pet trade. It is known for its chocolate-brown color and can grow up to 25 cm (10 inches) long. The millipede is a peaceful and relatively low-maintenance invertebrate that feeds on decaying organic matter and soft fruits and vegetables.  

Key characteristics
Appearance: A large millipede with a shiny reddish-tan to dark brown color, growing up to 25 cm in length.
Origin: Native to West African countries like Ghana and Nigeria.
Temperament: A peaceful and hardy species, considered suitable for beginners.
Role in nature: Plays a vital role in its ecosystem by breaking down organic material and enriching the soil. 

Care and habitat
Vivarium: A large enclosure with a minimum size of 60cm x 20cm x 50cm is recommended. 
Substrate: A deep layer (at least 10 cm) of moist substrate made from a mixture of humus, decaying leaves, and wood is ideal. 
Humidity: Needs a humid environment, with a humidity level between 50-80%. 
Temperature: Prefers temperatures between 22–29°C (72–84°F). 
Ventilation: Good cross-ventilation is important to prevent mold. 
Enrichment: Provide thick branches for climbing and hiding spots. 
Diet
Primary food: Decaying wood and leaf litter. 
Supplements: Also enjoys soft fruits and vegetables like cucumber, squash, apple, and sweet potato. 
Calcium: A calcium source, such as cuttlebone or ground limestone, should be included for exoskeleton health.