H.R. 840 would nullify a Fish and Wildlife Service regulation issued in June 2024 that protected six species of freshwater mussels as endangered and one species as threatened. These mussels—including the Guadalupe Fatmucket, Texas Fatmucket, Guadalupe Orb, Texas Pimpleback, Balcones Spike, False Spike, and Texas Fawnsfoot—are found primarily in Texas waterways. The bill, introduced by Texas representatives, would eliminate the endangered species protections and critical habitat designations for these mussels, effectively removing federal safeguards that restrict development and other activities in areas where they live. The legislation contains no funding provisions or implementation timeline, as it simply voids an existing regulation. This bill would primarily affect conservation efforts in Texas and any parties subject to restrictions under the Fish and Wildlife Service rule.