[got2surf]

Probably St. Augustine grass (https://en.wikipedia.org/wiki/St._Augustine_Grass) given that it is Florida.

St. Augustine is so tough, it even crowds out weeds! Not as soft as the Bermuda grass on golf courses, but very resilient.

[DoubleCribble]

I'm pretty sure Bermuda grass can never be killed. No matter what you do to it, it always comes back. It's the athlete's foot of lawn pests.

[Taniwha]

In Berkeley ~25 years ago we had a severe frost, pipes popped, the eugenia hedge dies and so did the bermuda grass lawns too .. we pulled them and replaced them with traditional sod

So ... yes it can be killed ....

[DoubleCribble]

Did you dig the Bermuda grass out of the ground? Physically removing every blade, runner and root nodule it is the only way I know of to get rid of it.

[Hextinium]

All the Bermuda grass in our yard in Texas died after 3+ years of 90 days over 100 while the Saint Agustin keeps growing and growing.