Zooplankton and crayfish

Bloody-Red Shrimp (Hemimysis anomala)
The bloody-red shrimp is one of our most recent ballast water invaders. Read more…

Fishhook waterflea (Cercopagis pengoi) 
These tiny little invasive zooplankton form clumps that can look and feel like gelatin or wet cotton. Read more…

Red Swamp Crayfish (Procambarus clarkii)
This invasive crayfish can be a host for parasites and diseases, and it aggressively competes with native crayfish and other species for food and habitat. Read more…

Rusty Crayfish (Orconectes rusticus)
The rusty crayfish is a very aggressive species that often displaces native crayfish. Read more…

Spiny waterflea (Bythotrephes longimanus)
Waterfleas can clump together on fishing lines, nets and other gear, and they disrupt the food web. Read more…