I stumbled upon these terms in a text related to Pisciculture (fish farming).
I've looked on Google and Google-books but I couldn't find any type of definition.
P.S. Please let me know if I posted it in the right community.
Seasonal ponds are ponds that only exist for part of the year. Jamesqf covered it well in his comment. There is just a wide variety of terms explaining the same thing. The terms were originally used more for streams (Perennial water), but it has slid into broader usage.