I think I read something saying there actually used to be a restaurant there before, which is interesting. A sit-down restaurant with views of Mission Bay would be lovely, and I don't know why they haven't already built one in the Waterfront area near the cabanas. The square footage and name I saw mentioned in the permit made it sound like something minor, like a grab-and-go or quick service stand, but I hope I'm wrong because that'd be a huge missed opportunity.
I'm guessing the Jellyfish exhibit will open June at the earliest, but hopefully at least sometime this summer. Based on the concept art I think they're just repurposing the existing ride station building, so there might not be any major construction to see from the outside.