Approximately how many species of dolphin and whale make their home in the Gulf of Mexico in 2020?

I've enjoyed the pleasure of seeing many of these different species whilst living in Florida and miss it more than I can express.

Not sure what to think of this question. Killer whales are not whales but dolphins so this question seems okay but the explanation is incorrect.

It's just they are all mammals in case you miss my point.

9 mammal species of dolphin. What other types exist? 2/10 for effort.