Spiny Waterflea
Spiny waterfleas are voracious predators of small zooplankton, like Daphnia, an important food for young native fishes. They reproduce rapidly and eggs are capable of lying dormant all winter, resisting drying and freezing. As a result of their sharp spines, smaller fish cannot readily consume them, adding to their explosive populations.
Common Name: Spiny waterflea
Scientific Name: Bythotrephes longimanus
Native Range: Europe & Asia
Background
Spiny waterfleas are tiny crustaceans less than ½ inches long with long, sharp, barbed tails. Spiny waterfleas collect in gelatinous globs on fishing equipment and lines.
Habitat
Spiny waterfleas thrive in deep lakes but can also be found in shallow lakes and rivers.
NYS Distribution Map
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Identification
Spiny waterfleas have a long spine with barbs. They gather and appear as gelatinous globs or wet cotton on fishing lines.
Impact
Spiny waterfleas are voracious predators of small zooplankton, like Daphnia, an important food for young native fishes. They reproduce rapidly and eggs are capable of lying dormant all winter, resisting drying and freezing. As a result of their sharp spines, smaller fish cannot readily consume them, adding to their explosive populations.
Prevention and Control
No control methods exist. Prevention is key. Since fishing and boating equipment is the most likely means of spread, anglers and water-users must take precautions. Boats and gear should be thoroughly checked, cleaned, and dried before entering new waterways.
