On the peninsula of Methana there are steep and rocky beaches such as from Vathi to Krasopanagia, which are suitable for free diving and underwater fishing.
In general, all of the bay of Epidaurus is a great fishing area, where the visitor can fish, either from the coast, by boat or by inflatable (with pole or rope or other types of fishing).
Also from Vathi you can take the roundabout of the entire Methana Peninsula, which creates wonderful small coves, with a speedboat or a small sailing boat and "hang out" for bathing or fishing.