This Octopus candelabra would make for the neatest table centerpiece. Perhaps sitting on a blue-green fabric swatch. Paired with some real wax LED candles, you can skip the fire hazard and drip mess.
I’d love to try this out for a themed board game night. With, perhaps, calamari as an appetizer.
I sifted through some underwater-themed games on boardgamegeek and found a few that had high ratings and are available now: