For those who want to have some fun by the water soon, be sure to watch your step. Because in recent days, there have been jellyfish sightings in the hundreds and thousands.
Dr. Larry McKinney of Texas OneGulf Center of Excellence says that's not uncommon after a hurricane.
"It's almost expected within a month or so after a hurricane," Dr. McKinney said. "Because it's just like anything else -- if you put food out, animals will eat it and they'll grow and expand."
Nutrients and food washed up on the shore after Hurricane Harvey, which in turn provided a perfect feeding ground for animals to eat and grow.
And jellyfish are just part of the food chain. First plankton, then jellyfish, and soon fish, shrimp, and crabs will be seen in large numbers.
"There's lots of nutrients that are pinned up on the shoreline," Dr. McKinney said. "And when we have all this rain and flooding, it washes them into the ocean and it sets off this chain reaction. So there are lots of jellyfish right now."
The jellyfish popping up now are moon jelly. They're pretty harmless, but a sting will have you itching.