Waipio Valley Stream Restoration Study

Crustaceans: Introduced Species

Scientific name: Macrobrachium lar
Common name(s): Tahitian prawn

Macrobrachium lar

Status: Introduced

Habitat: Tahitian prawns like shaded pools and sheltered parts of the stream.

Preferred Area of Stream: Deep pools

Range in Hawai‘i: Common on all Hawaiian Islands

Diet: They eat almost anything, ranging from algae and plant matter to fish and snails, and harm native stream species through predation

Predators: Very few except ‘auku‘u (black-crowned night-herons)

Fact: The Tahitian prawn has a life cycle similar to the native. When it was released on Moloka‘i and O‘ahu as a food crop, its babies traveled to other islands. They probably compete with native species for food.