Perciformes are a diverse order of ray-finned fish which contain fish commonly known as Sea Bass, Groupers, Darters and Perch.

Evolving during the Palaeocene, the Eocene saw significant diversification in this group. Known for their robust, spiny dorsal fins, there are currently two described species within the group but there are a number of others yet to be described.

This is an artistic reconstruction of an extinct Serranid fish – Serranopsis londinensis swimming in the Eocene seas.