Big Roughy
Gephyroberyx japonicus
- Least concern
- Card rarity: Common
- Fish

Gephyroberyx japonicus, the big roughy or blueberry roughy, is a species of fish in the family Trachichthyidae. It is endemic to the northwest Pacific off Japan, Taiwan and Hawaii, and can be found at depths between 300 and 1,500 m (980–4,920 ft). It can reach 30–35 cm (12–14 in) in length. Based on broadly overlapping morphological features it is sometimes considered a synonym of G. darwinii.
Classification
- Class
- Actinopterygii
- Order
- Trachichthyiformes
- Family
- Trachichthyidae
- Genus
- Gephyroberyx