This is the 11613th most frequent Spanish word.
flotas
"Flotas" means "fleets" or "you float" (depending on context).
In this sentence, 'flotas' refers to 'fleets', specifically groups of fishing boats.
Las flotas de pesqueros salen al amanecer.
The fishing fleets leave at dawn.
Here, 'flotas' is a verb form meaning 'you float', referring to the action of staying afloat on water.
Tú flotas en el agua como un corcho.
You float on the water like a cork.
In this case, 'flotas' again means 'fleets', referring to groups of school buses organized together.