From a Roman bathouse there is a series of mosaics, inventory numbers 825, 829 and 830. They represent sea-related scenes. They are on one floor in the new museum, but I here sort the ones with number 829.
In the catalogue it is indicated that they are all from the same room in an Antakya bath house, fourth century AD. I used to have the other mosaics from that bathhouse in a set with these, but decided to order them with the mosaics in general.
From the Wikipedia I understand that a group of followers of a god, often in their ecstacy, was called a thiasos. Most often we see the one of Dionysus, but this must be one of the sea god Poseidon, depicted as a triumphal wedding procession with Amphitrite, attended by figures such as sea nymphs and hippocamps.