We recently visited the aquarium in Sidney (the Centre for the Salish Sea). I enjoy seeing the weird and wonderful creatures that live in the sea around us. It's a challenge to take photographs at aquariums - not much light, dirty glass, reflections, people in the way. Sometimes I don't even try but this time I did and I got a few that I liked.
Nudibranchs are a favorite. "sea slug" doesn't sound very appealing but they can be very colorful. This Hooded Nudibranch isn't very colorful but has a fantastic shape, a bit like a venus flytrap.
They also look a bit like sea jellies.
Tentacles seem to be a common theme with sea creatures.
The fish here are quite different from tropical fish but they can still be quite colorful.
Last but not least, a few Decapods (crabs, lobsters, shrimp). "decapod" means 10 legs but they can have up to 38 "appendages", they just call 10 of them "legs".