Marina Cove is the small rocky bay on the southern side of Linley Point, separated from the busier Fishermans Beach and its boat ramp by the point itself. The Scuba Doctor lists it under the alternative name Linley Point South and describes a boulder-strewn floor that deepens gradually as you move offshore, from 2 m at the rocks to about 8 m a hundred metres or so out. It is an extension of the same reef that makes Point Linley worthwhile, and it offers the same habitat – tumbled sandstone boulders with crevices and small overhangs, brown algae on the tops, seagrass and coarse sand between – with a little more sand and slightly less relief.

Small fish and crustaceans are the staple: hulafish, bullseyes and magpie perch in the gaps, leatherjackets and old wives over the weed, decorator crabs, hermit crabs, shrimp and small octopus under the rocks. Rays and flathead settle on the sand and goatfish forage along the reef edge. Because the cove is set back from the ramp it is a slightly quieter entry than the rocks beside the ramp, and divers who want to do Point Linley without contending with launching boats sometimes start here and swim around the point.

On its own it is a short, easy dive suited to Open Water divers, snorkellers and anyone wanting an unhurried look at a natural rocky shore a few minutes from Mornington. There is a caveat about the name: several places on the Peninsula are called Marina Cove, and this one is specifically the cove south of the Fishermans Beach ramp, not the marina at Blairgowrie or the cove at Safety Beach. Facilities are those of Fishermans Beach; there is nothing at the cove itself.

It will not hold an experienced diver's attention for long, but as a companion to Point Linley or as a first shore dive it is pleasant and safe on the right wind.

From Mornington drive north along the Esplanade about 1.5 km; opposite King George Avenue a track leads down from the Esplanade to the cove on the south side of Linley Point. Park on the Esplanade or in the dirt car parks above Fishermans Beach and carry gear down the track, roughly 100 m. Enter over the boulders at high tide and swim out; the bottom deepens gradually offshore.

Exit the same way, or in calm water swim north around the point and exit at the rocks beside the boat ramp.

Like Point Linley next door, Marina Cove is calmest on southerly through easterly winds and becomes choppy and murky in westerlies and north-westerlies. Enter near high tide to cover the boulders. No current.

Boat and jet-ski traffic from the adjacent Fishermans Beach ramp passes close to the point, and anglers fish from the rocks, so tow a float and flag and expect fishing line. Visibility is usually reasonable because the bottom is rock and coarse sand rather than silt.

Enter over the boulders, descend in 2–3 m and head straight out over the boulder slope to 6–8 m, then turn north toward Linley Point with the shore on your left. Explore the boulder crevices along the point, turn at half gas, and return along the same slope, surfacing inside the cove away from the boat channel.

No regular operator – independent shore divers; sometimes combined with Point Linley Reef by clubs.