Bugs

Greenhead Fly

This is a listing of some of the tiny critters that you might find. I'm not including all the invisible biting nasties that you find around the water. That's what bug spray is for. Above is the horrible Greenhead fly - the bane of New Jersey summers. When one of these bites you, you know it.


Whirligig Beetle

Whirligig Beetles are typically found in groups making crazy circles at the surface, although they are also capable of diving and flying. These are 'true beetles', not bugs. They are harmless scavengers.


Orbweavers

Orchard Orbweaver

If you are trying to escape the sun in the shade of overhanging tree branches, you are inevitably going to get spiders in the boat. These are almost entirely harmless orbweavers - they are not aggressive and don't bite, and are not poisonous to humans, at least no more poisonous than a honey bee. That said, our brains are programmed at the most basic level to fear spiders, and I don't like them any more than anyone else. Just calmly knock it out of the boat.


Dragonflies

Eastern Pondhawk - female ( males are blue )

Dragonflies are aerial predators with a strong liking for water, so you are very likely to get 'buzzed' while out kayaking. They are harmless to humans. Dragonfly larvae are fully aquatic little nightmares. There are many kinds of dragonflies in the region, too many to list.


Clinging jellyfish are shown swimming in a jar in 2016. The small jellies can pack a dangerously powerful sting. Tanya Breen/staff Photographer

Amanda Oglesby
Asbury Park Press
June 19, 2026

BRICK - A surge of clinging jellyfish are infiltrating the Metedeconk River, where a 6-year old child has already suffered a severe string, said New Jersey's leading expert on jellyfish.

Paul Bologna, the director of Montclair University's Marine Biology and Coastal Sciences Program, said the river's north bank has "a huge number of these clinging jellies." These coin-sized translucent jellyfish cling to sea lettuce and filamentous red algae common in the Jersey Shore's coastal rivers and estuaries, he said.

"Their tentacles have special adhesive pads that ... suction cup themselves onto that stuff," Bologna said.

Despite their small size, the clinging jellyfish pack a dangerously powerful sting, one that can lead to days-long hospitalizations, the biologist said.