I’ve done the Beluga and Walrus, Dolphin Up-Close and Sea Lion Tours over the last few year and can definitely recommend both the Beluga one and the Dolphin one.
I posted a review of the Beluga and Walrus Tour a while ago in another thread so I'll copy and paste it here too. Keep in mind that this was from June 2016 so some details might have changed since then like times etc.
"For the Wild Arctic tour our tour time was 2:15pm - 3:15pm. On our tour there were 12 people in total (our group of 3, a family of 4 and another family of 5 but the grandma of that group ended up sitting most of it out because her
ECV couldn't get through some of the doorways of the backstage areas and she didn't want to be out in the heat in the outside backstage area which a lot of the tour takes place in)
The meeting place for the tour is by the bronze polar bear statue by the Wild Arctic shop and that's where it ends too. The only thing you're allowed to take with you on the tour is your sunglasses and a bottle of water. Everything else had to be put into a locker, which were one per family/group and you had to leave your sunglasses/bottle with the tour leader when you were interacting with the Belugas.
The first part of the tour was just an explanation of how they take care of the animals at the Wild Arctic enclosure and the second part involved interacting with two Harbour Seals (stroking & posing for pictures), then stroking & feeding a Beluga Whale (we did this kneeling on a platform in the bit where you view them after coming off the ride but the trainers told us normally they do this bit of the tour in the back enclosure, it just depends on where the Belugas want to be at the time) and then we ended the tour by feeding fish and squid to a Walrus that's kept in it's enclosure behind bars because they don't like being touched and then posing for some pictures with her.
Overall I definitely think it's one of the better tours that SW offers now."