Flea beetles are an annoyance on many host plants. They especially love eggplant, melon and beans. They are very small, jumping beetles---thus their name. They can vary in shape and color. Flea beetles are generally worse earlier in the growing season. If infestation is high enough, plant health will be stunted and can wilt. Here are a couple of good articles from K-State Research and Extension and University of Minnesota Extension about flea beetles.
https://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/Flea%20Beetle.pdf
https://extension.umn.edu/yard-and-garden-insects/flea-beetles
https://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/Flea%20Beetle.pdf
https://extension.umn.edu/yard-and-garden-insects/flea-beetles