How to Fish Multiplayer: Co-op Lobbies up to 8 Players
How to Fish multiplayer hub: online co-op supports up to 8 players since Patch 1.0.4, private lobbies since 1.0.5 — sessions, revives, and pricing.

How to Fish is built as a co-op game: bosses are easier with more guns, teammates can revive each other instead of dying outright, and the chaos scales with the crew. The current player limit is eight — official Patch 1.0.4 added support for up to 8 player lobbies, and Patch 1.0.5 added private invite-only lobbies, even though the Steam store description still says 1-4.
The guides
The max players guide tracks the full patch timeline behind the lobby limit, how to configure public and private sessions, and what changes between solo and co-op runs. To find teammates, the developers point players to the official community Discord. If you are waiting on a console release before grouping up, the platforms section tracks the current status.