The Rock Anemone (or Flower Anemone) is an interesting creature. It likes meaty foods, but doesn't grow much larger than 4" in diameter. The base is locked firmly in a crevice, but it changes shape quite quickly. During feedings, the mouth enlarges and resembles two lips. They come in various colors - I've seen brown/green, light green, and orange. It is quite sticky and will eat anything that ventures too closely.
The blue tang or Hippo Tang is quickly recognized by most anyone these days since movies like Finding Nemo and Finding Dory featured this fish. It's a Regal tang, Paracanthurus hepatus, and I've kept a few over the years. They are fast swimmers, love space, and will seek shelter in the oddest places.
The Copperband Butterfly fish is a good hunter of aiptasia (pest anemones) in the reef.
One of the more beautiful dwarf angels is the Flame Angel.
If you want to confuse your friends, these Redspot Cardinalfish - apogon parvulus - visually appear to be freshwater fish swimming around your saltwater display, but they are a saltwater species. They are very timid fish, and grow to a maximum size of 1" in length.
The Melanurus wrasse is usually sold as a smaller juvenile fish but will grow quite large over time. This one is about 6" in length.
The Leopard Wrasse is one of my favorite fish, yet I've not been able to keep one alive longterm.
The most recognizable saltwater fish is usually the Yellow tang - Zebrasoma flavescens - that come from the Hawaiian waters. These fish are very active swimmers, and need plenty of swimming room in your aquarium.
The Hi Fin Red Banded Goby is a tiny addition and best suited for a nano-sized aquarium. In a larger reef, you may never see it again. It pairs up nicely with a pistol shrimp, and often you can purchase these together.
The Tangerine Skunk clownfish are tank raised by Sustainable Aquatics and don't have a white bar on their cheek area. Skunks are harem fish, and can be added to the tank in large groups -- always in odd numbers rather than even numbers. These are in a Sebae anemone.