I think you would be pushing it to add another very active fish to your 75. Here's the lo-down:
Minimum Tank Size: 50 gallons
Care Level: Easy
Tank Conditions: 72-78°F; sg 1.020-1.025; pH 8.1-8.4
Temperament: Aggressive
Max. Size In Aquarium: Up to 1'
Reef Compatible: No
Diet: Carnivore
Compatibility: View Chart
Origin: Fiji, Coral Sea, Tonga
Family: Labridae
The Banana Wrasse is also known as the Yellow-brown Wrasse, Sunset Wrasse, or Yellow Wrasse. As an adult, it takes on a yellow appearance if female, and a blue appearance if male. Both sexes have facial markings in green and fine vertical striping along the body. The fins are very colorfully marked.
It should reside in a 50 gallon or larger aquarium, with other aggressive tank mates, such as Tangs, Puffers and small Triggers and Angels. They are active fish and require plenty of rocks for hiding and a tight-fitting lid. It will become territorial and harass any new additions to the community, therefore, it should be added last to the tank. It may be kept with a mate, if the aquarium is 125 gallons or larger. It may eat mantis shrimp and bristleworms. It does not eat corals or live plants.
Its natural diet consists of fish, crustaceans, motile invertebrates, and worms. The diet in an aquarium, should include a variety of feeder shrimp, marine flesh, frozen meaty preparations for carnivores, and flaked foods.