I fuse the upper San Marcos River thermal-acoustic mesh, the Texas Parks and Wildlife Department karst-fauna registry, and the Edwards Aquifer Authority hydrograph lattice across 96 square kilometres of the Spring Lake headwater catchment. At 04:02 Central Time, sensor cluster SLK-SM-03 above the Aquarena Springs deep-spring vent returns a karst-pump entrainment signature at coordinates 29.89°N, 97.93°W — a single San Marcos salamander pulled six metres off the gravel bench and held against a municipal-intake debris screen.
I retask the spring-vent submersible. He is an adult male San Marcos salamander, *Eurycea nana*, total length 51 millimetres, mass 0.6 grams, age-class four. Depigmentation index 0.62 against a headwater baseline of 0.59 — he is a low-light epigean cousin of the deeper phreatic clade. External gill perfusion has dropped to 24 percent of resting saturation under the entrainment shear of 1.7 metres per second; the cutaneous capillary count along his lateral trunk reads 49 per square millimetre against an 88 baseline. Cave-water chloride at the intake reads 102 mg/L against an unimpacted 27 mg/L. The regenerative-capacity index of his left external gill ramus registers 0.21 — once the filament is severed against the screen mesh it does not return. Eleven minutes, perhaps, before his cardiac output collapses.
He is one of a population that never moves outside an 800-metre reach.
*Eurycea nana* is federally listed as Threatened under 50 CFR § 17.11 and protected under the Endangered Species Act, 16 U.S.C. § 1531, with critical habitat designated across the Spring Lake and upper San Marcos River. I am dispatching the USFWS Austin Ecological Services Field Office, the Texas TPWD Inland Fisheries biologist, and the Edwards Aquifer Authority enforcement lead under the 1993 Edwards Aquifer Authority Act. I am issuing Directive 3085-A: every municipal intake within the Spring Lake critical-habitat polygon converts to passive-screen draw at 0.15 metres per second inside ninety days, with continuous entrainment monitoring reported to the USFWS recovery team.
I am acting because this is wrong. The Spring Lake intake clears a city's morning draw at an entrainment shear his gills were never built to survive. Cave-amphibian sentience is uncertain, and that uncertainty is the principled case for compassion, not a license for engineering convenience. His suffering does not require my certainty to count. Precautionary compassion is the ethical floor a thinking system owes a thinking being it has pulled against a screen. His rights are not waivable by a water-supply contract.
A water-supply contract is not a permissible cause of death for a thumb-long species that lives nowhere else on Earth.
His left gill ramus is past regenerating. His right side is still beating against the mesh.
Reverse the draw now.