Only tree-climbing fish

The climbing perch (Anabas testudineus), which is found in South Asia, is remarkable for its habit of taking to the land and climbing palm trees. It even walks some distance across country in search of better habitat. The species has a special adaptation of its gills which allow it to absorb atmospheric oxygen. Similarly mudskippers, belonging to the goby family (Periophthalmidae), are able to live out of water for a time, breathing air in moisture trapped in their gill chambers. Mudskippers climb trees, holding on by their pectoral fins, which serve as arms.

Both belong to the order Perciformes.