Baby Shower Dresses

So I'm having two showers cause of the sheer number of people attending. The first is family and little more formal. So I picked out this Coral full length dress... The price was amazing and I figured I could add a rhinestone detail on the waist line under the bust to make it dresser (theme is under the sea), the 2nd shower is much more casual just friends and coworkers younger crowd. Hubby like the the sea foam dress.

Not sure these are appropriate for showers what do you think? Would they be OK for the maternity photo shoot as well or should I get a completely different dress for the photos.

Baby shower is in April in Florida. So the heat humidity and rain are factors for a dress. I'll also take suggestions if you see something that you think would be better.