The FRIDA posture shows some prominent ribs on the seafloor.
The 27-year-old Norwegian model recently tied the knot with Italian luxury yacht company founder Tommy Chiabra.
The couple set off on their matrimonial journey in front of their family and friends – including former Topshop owner Sir Philip Greene, 70, and their daughter Chloe, 31 – in Portofino, Italy.
They married at Divo Martino Church 11 months after Tommy proposed.
Frida shared a photo from her run-in day on Instagram and told her fans: “A sneak peek at our boat party the day before our wedding.”
Had they dropped it later they might have missed the boat.