I stayed at Utila Lodge, nice but I would like to try Mango Inn the next time and glad to hear you liked it.
We had whalesharks everyday and once swam with a pod of bottlenose. The reef seems to be missing the edible size fish but other than that in good condition.
Other than walking there isn’t a lot to do on Utila during the suface intervals, at night some would gather at the end of Utila Lodges dock to watch the eaglerays feed under the lights but that’s about it!