Mosman Bay is one of the deepest pockets in the lower Swan, and the jetty off Johnson Parade puts you straight over it. Big mulloway patrol the deep water after dark, bream hold along the pylons, and the east-facing aspect means the afternoon sea breeze is someone else's problem. When the coast is blown out, Mosman fishes anyway.

Drop baits straight down the pylons for bream and tarwhine — prawn, bloodworm or small mulie strips on a light running sinker. For mulloway, fish the deep channel on dusk and into dark with a whole mulie or live herring. Work soft plastics along the drop-off for flathead, and keep a squid jig in the rotation during spring — the clear water behind the jetty can hold good calamari.

Black bream (around pylons, year-round), flathead (sand edges), mulloway (deep water after dark), tailor (autumn, dawn/dusk), tarwhine, herring, yellowfin whiting (summer), and southern calamari (spring through autumn).

Swan-Canning cobbler are subject to size (430 mm min) and bag (8) limits and periodic seasonal closures — verify current DPIRD rules before keeping any. If the bream go quiet on the pylons, step out to the end and work the drop-off; the depth change is where the bigger fish sit. Don't fillet on the boards; the lights pull gulls in fast.

Park along Johnson Parade in Mosman Park; the jetty is a short, level walk from the road. The jetty itself is sealed and railed, with benches along the deck — among the more comfortable land-based sessions in this batch and one of the better Swan options for mobility. Public toilets and a small grass reserve are immediately on the foreshore. Lighting on the jetty is solid for evening sessions, but a head torch is still useful for rigging in the deeper end after dark. Parking fills on calm evenings; arrive early or walk in.

East-facing bay tucked into the south bank means the spot is largely sheltered from the afternoon Fremantle Doctor — it's a reliable post-work option when the coast is blown out. Tide influence is muted in this stretch but enough to push activity around the pylons; the rising tide into dusk is the best feeding window for bream and the lead-in for mulloway. Water is generally clear except in the days after heavy rain when the upper river silts the system.

Light hazards by Perth standards — sealed jetty, railings, level shore. Boards get slippery in heavy dew and after rain. Bluebottles drift in during summer northerlies. Cobbler spike badly; if you hook one, hold the line clear and release with care — never grip them. The boat channel runs adjacent to the jetty and there's some recreational boat traffic during the day; keep long casts clear of moving vessels.

Yes — Mosman Bay is one of the deepest pockets in the lower Swan, which is the main reason mulloway hold here. The drop-off at the end of the jetty is where the depth change works in your favour.

Yes — the jetty has good lighting and is one of the more comfortable after-dark options on the Swan. Mulloway are the standout target on a rising tide into dark.

The bay is east-facing and tucked into the south bank, so it's sheltered from the afternoon SW seabreeze. When Fremantle's blown out, Mosman is often glassy.

A small running sinker rig on 4–6lb fluoro leader, baited with prawn, bloodworm or small mulie strip fished tight to the pylons. Light gear suits the clear water — heavy leaders get refused.