Jacques Cousteau's lunchbox is a highly sought-after piece of memorabilia, not for its value as a piece of oceanographic nostalgia, but for the portal to the underwater Bacchanalia contained within. Doggie paddle to oceanographic dining delights with today's Groupon: for $20, you get $40 worth of fresh seafood and innovative, globally inspired cuisine at Marker 32.

Named one of Jacksonville magazine's Top 25 Restaurants in 2009, Marker 32, nestled across the Intracoastal Waterway from San Pablo Island, serves up dazzling sea fruits on the waterfront for optimal reflection and potential mermaid visitations. Start an elegant evening or celebrate making it through croquet camp unscathed with oysters on the half shell ($7) or broiled with bacon, spinach, and sundried tomatoes ($7). With the opening ceremonies slurped from their handsome shells, customers may graduate to the main course, which may include seared scallops served over creamy grits with a red-wine-and-mushroom gravy ($18), or caked blue crabs with a caper dill aioli, cozily nestled on a scenic platescape of steamed spinach and new potatoes ($19).

In addition to a selection of Southern-style fried seafood, Marker 32 also offers landfare for fishophobes, such as the white-bean ravioli, with roast corn, bacon, and wild-mushroom sauce ($13). Plush wraparound booths, large enough to accommodate triple dates or meetings of the astronaut-aspirants club, wrap around the eatery's upscale interior, and the waterfront location offers picturesque views of the adjacent waterway.