Only a 4-minute RIB ride from the center of Šimuni leads to the location of Mandre. A wall begins to fall down from 21 to 44 meters of depth. The walls are home to numerous animals such as eels, octopus, small snails, and during spring and early summer you can see Small-spotted catshark eggs. A large crack in the wall is a real sea house for the Brown meagres.