Cryptic Tadpole Shrimp

Lepidurus cryptus, or the cryptic tadpole shrimp, is a relatively small species of freshwater crustacean endemic to California and Oregon. The name "cryptus" is derived from its role as a cryptic species, being visually indistinguishable from Lepidurus packardi. Though its range is large, it remains uncommon, and is considered a vulnerable species by NatureServe. It lives in temporary pools of water throughout its range, which may be filled with aquatic plants.