COMETA (abbreviation for COnexión MEditerránea Transporte Alta tensión; also known as the Majorca–Valencia interconnector and the Romulus project) is an undersea electric power transmission system between mainland Spain and the island of Majorca.

It connects Morvedre near Valencia and Santa Ponsa near Palma de Mallorca.

On 26 September 2007, contracts between Red Electrica de España and the cable manufacturers Nexans and Prysmian were signed.

[4] Trenching was done by waterjet from the Multipurpose Supply Vessel (MPSV) Edda Fjord and dredger Argo I. COMETA became operational in early 2012, initially at reduced capacity then fully from August 2012.

It is planned to extend the connection to Ibiza and Formentera with a second underwater cable, (115 km) long and 800 m deep, operating at 132 kV AC.