Which category of creatures, in addition to insects and mollusks, forms a staple part of the giant water bug's diet?

Answer

Crustaceans.

The menu for a giant water bug is defined by its opportunistic nature and broad predatory capability within its micro-habitat. While they readily consume other aquatic insects and slow-moving mollusks such as snails, the text explicitly confirms that they also actively hunt crustaceans. This variety demonstrates their role as generalist feeders at the lower end of their dietary spectrum, consuming readily available small invertebrates alongside targeted vertebrates.

Which category of creatures, in addition to insects and mollusks, forms a staple part of the giant water bug's diet?
water bugdietinsectaquatic