Sweet! (sorry for the late reply, I've been indecisive on how I want to do this exhibit!)
I'd definitely want the Caribbean monk seal to be the big attraction in a larger area. I'm gonna design this under the idea that the species never went extinct and not that they were cloned back or something. I've always liked the idea of a zoo that contains entirely Texas wildlife, and given that the Texas Gulf Coast lacks visible marine mammals other than the bottlenose dolphin, I'm sure the Caribbean monk seal would be prominently featured in any major Texas zoo or aquarium. So of course it would be perfect for Texas Trails!
Texas Coast would have an aquarium building as well as outdoor exhibits. The outdoor exhibits would mainly feature large coastal birds, including the whooping crane, osprey, roseate spoonbill, brown pelican, and white pelican. The aquarium building would mostly have saltwater fish species, along with green sea turtles and some crustacean species. The Caribbean monk seal exhibit would be in both. Outdoor viewing area allows visitors to observe the seals on a sandy beach, with a wooden pier where the seals can sun themselves and partake in care and enrich demonstrations. There would be shade structures for the seals as well. Inside the aquarium building, guests get an underwater view of the exhibit.
In terms of signage and educational display, the outdoor viewing area will focus on their biology and how they live in the wild, and the indoor area will focus on their conservation and educate guests on how to properly observe the animals in the wild.