This otter be fun

Anang, a female otter, gnaws on a carrot, one of her favorite treats, while painting his next work of art at the Great Lakes Aquarium in this 2012 file photo. (2012 file, Bob King / News Tribune)

Cheesecake we can understand, but fish cake?

Zhoosh and Anang the river otters really are getting on in years, but that doesn’t mean they don’t enjoy birthday cake. And when we say “cake” it means birthday cake-shaped ice with fish packed inside of it and fish on top.

A birthday party will be held for the Great Lakes Aquarium resident otters, both celebrating milestones, from 11 a.m. to 4 p.m. Saturday.

Anang turned 16 in January, and Zhoosh turns 13 in March. Each guest who brings a gift from a wish list for the otters, famous for their artistic abilities, gets $3 off admission.

The wish list is at the Great Lakes Aquarium website.

Sheet cake (fish-free, we think) and punch are available to everyone at 2 p.m. when the otters eat their fish cake. Other events run throughout the day, beginning with a dive show at 11 a.m. and ending with stingray feeding at 4 p.m.