'Dolphins' isn't the sum and parts of the brand, and no matter how much some may wish to pretend otherwise it's impossible to separate it from the other facets of the Redcliffe Dolphins brand. Which, BTW, is why people are arguing over the geographical name at all.
Also, this mythologizing that Dolphins is some irreplaceable brand that holds universal appeal is absolute nonsense. They could have adopted any number of aquatic/semi-aquatic animals of similar cultural and regional relevance for their NRL side (if that's the route they chose to go) and it would have worked fine. Dugongs, whales, sea lions, turtles, rays, octopus, etc, etc, the list is honestly endless.