That little brownish dot with red eyes? That’s a fruit fly. It’s the most common house bug. It loves your overripe banana more than you do. Actually, it loves the yeast growing on it.
Here’s a weird fact: fruit flies can smell a rotting apple from miles away. Not literally miles, but pretty darn far for a bug smaller than a sesame seed. They are also drunkards. They love fermented fruit for the alcohol content. Yes, your fruit fly is a tiny party animal.
They breed like crazy. A female can lay 500 eggs in a week. That’s why one banana turns into a swarm overnight. They don’t bite, though. They just annoy you with their aimless flight patterns.