Wakinoichthys is a small freshwater fish from the Early Cretaceous of South Korea[2] and Japan.

The first specimens of Wakinoichthys have been discovered in the Wakino Subgroup, a part of the Kanmon Group from Kitakyushu in 1994.

[2] The generic name derives from the Wakino Subgroup and ichthys, the Greek word for fish.

[3] Wakinoichthys aokii was a proportionally long and slender fish, reaching lengths between 7–12 cm (2.8–4.7 in) which are 6.4 times longer than its body depth.

[3] Yabumoto assigns Wakinoichthys to the order of the Osteoglossiformes, which includes the modern arowana, butterflyfish, elephantfish and knifefish based on a series of characters such as the position of the median fins, dentition of the premaxilla and dentary and villiform endopterygoid teeth among other morphological traits.