G&F warns of zebra mussels in moss balls

What are these things called? Been wanting to get one for my moss ball container but can't find it anywhere online. : r/PlantedTank

Aquarium “moss balls” could contain invasive zebra mussels

Invasive Zebra Mussels Found in Moss Balls

Pest Alert: Zebra Mussels Found in “Moss” Balls — Oregon Invasive Species Council

A Two for One Special. Moss balls and zebra mussels, by U.S.Fish&Wildlife Alaska

Zebra mussels enter waterways via moss balls in home aquariums

Indiana DNR warns of invasive zebra mussels in aquarium moss balls

Invasive zebra mussels found in South Dakota's Lake Oahe

Pest Alert: Zebra Mussels Found in “Moss” Balls — Oregon Invasive Species Council

Invasive zebra mussels found in South Dakota's Lake Oahe

The U.S. Government Is Begging You to Destroy Moss Balls - Atlas Obscura

Pest Alert: Zebra Mussels Found in “Moss” Balls — Oregon Invasive Species Council

The U.S. Government Is Begging You to Destroy Moss Balls - Atlas Obscura