LOL! We were just at Mystic Aquarium today (I live about 1/2 from there). We were also there about 3 weeks ago too.
Hopefully it will warm up for you.
My kids love the aquarium (they are almost 6, 3 1/2 & 13 mo).
The inside part (where the big fish tanks are) gets hot not to mention it does have an odor when you initially walk in.
If you go to the website you can look up to see the feeding times if you are interested.
It only takes us about 3 hours to see it all & that is with a lunch break (I am talking aquarium).
There is also a ride but I have never been on it since my kids are young.
There was a new baby penguin we saw today that was hatched the end of Feb & her feathers were starting to come off.
We like the shops in the Old Mystic Villiage but the past 2 times we have gone it was too chilly to walk around so when we go back in the summer we will.
When we go, this is how we always walk-we see the beluga's & then follow the path to the sea lions & seal & then we go to the penguins.
Then we take the path around the water area & see the little turtles sunning themselves (there were 7 we saw today).
Then we go inside.
When we go inside after walking past the jelly fish we go to the left to those fish tanks & then we come out to the sea anemone area (no touching zone) & then my dh takes the older 2 into the "cave" aka where the spiders/bats are & then we walk around the other smaller tanks until we get to the bigger ones with the sting rays & sharks as well as the big fish tank & we also hit the touch tank.
We didn't do the Escape to the Deep or whatever it is called this time because our kids don't enjoy it & we just did it 3 weeks ago.
As for the seaport, we have never done that. I keep saying we are but I usually have a preggo body or a nursing baby so hopefully this year we can walk around more since I have neither.
Do you live in CT? If you do check your library for passes to the aquarium & the seaport. My library gives a discount for the aquarium & free passes to the seaport.
Here is a picture from a few weeks ago from the penguin area
And one from today from the touch tank area: