Manta Point
Drift snorkelling over a cleaning station. Conditions dependent, and the highlight of the route when it works.

Specialty
Most Rinca trips include a snorkel stop, and the good ones plan it around the tide. Current is the thing that decides whether a site is superb or unswimmable.
Plan a Snorkel DayWhere
Rinca itself is mangrove and mudflat. The reefs are a short hop away, and which one you get depends on the tide that day.
Drift snorkelling over a cleaning station. Conditions dependent, and the highlight of the route when it works.
Shallow, sheltered coral close to shore. The reliable option and the easiest for weaker swimmers.
A pinnacle with dense fish life. Strong current at the wrong state of tide — operator judgement matters here.
Taka Makassar and similar. Calm water, good for families and for anyone who wants to stand up.
Tidal flow through the park is strong and well documented. A site that is glassy at slack water can be a drift an hour later, which is why competent operators plan the day around the tide rather than a fixed order of stops.
Visibility follows the same rhythm. If a captain moves the snorkel stop, that is expertise showing, not a downgrade.
Komodo Luxury plan the stops around the water rather than the clock. Send your dates and they will say what is likely.