This is a microscopic Clodoceran species known only by its scientific name, and is difficult to detect. It is native to Asia and Africa, but became established (or noticed) by biologists in Missouri and Texas in 1990.  To our knowledge, no specimens of this Daphnia have been discovered in Iowa, although it may easily already be established here.

Many native species of Daphnia exist in Iowa. They are an extremely important fish food, especially during larval fish stages. Daphnia lumholzi, however, is covered with spines, and the spines make it difficult for fish to eat. It would be synonymous with a wolf trying to eat a porcupine. The concerns expresed with this species are identical to those with the exotic spiny water flea. Since Daphnia lumholzi would not be eaten by fish or other predators, it is more likely to survive and out-compete native Daphnia, dominating the available food base. This could result in less food available for larval fishes and ultimately less fish for anglers to catch.

When you boat in any water body, do not take your bait bucket water or live well water with you. Do not be responsible for the spread of this Daphnia and numerous other non-native creatures.