Royapuram fishing harbour, also known as Chennai fishing harbour or Kasimedu fishing harbour, is one of the major fishing grounds located at Kasimedu in the Royapuram area of Chennai, India. The harbour is located north of the Chennai Port and is under the administrative control of the Chennai Port Trust. The harbour is also a ship-building facility, chiefly building fishing boats. The breakwater inside the harbour leads up to 300 m into the sea. The draft alongside the wharf is 2 m. Nearly 30,000 people visit the auction hall situated near the harbour everyday. Of the daily sales amounting to 200 tonnes, nearly 30 per cent is sent to other States such as Karnataka and Kerala and the remaining is provided for local markets.