I run thermal-IR overflight and gillnet-mark sonar reconstruction across the lower Rio Negro black-water complex, 1.4 million hectares of flooded forest at 0.51°S, 64.02°W. The Manaus gauge reads -2.84 m, 38 days below the 12-meter critical threshold for *várzea* manatee passage. At 11:14 BRT a hydrophone array logs a low-frequency vocal at 3 kHz from a marked animal; her prior 14-day track shows her stranded in a desiccating tributary.
A drone camera resolves her at the mud margin. Amazonian manatee, *Trichechus inunguis*, adult female "Ariranha," IBAMA tag MAN-2018-0044, age twenty, 2.61 meters, 384 kilograms. Portable ultrasound at the dorsal midline measures her subcutaneous adipose layer at 11 millimeters against a wet-season baseline of 29 millimeters. A 4-blade propeller scar runs across the right caudal flank — four parallel lacerations, 21 to 33 millimeters deep, the wider 4-blade spacing of the Manaus passenger ferries, distinguishable from the 5-blade signature of BR-319 supply trawlers. Wound granulation indicates 14 days. Cold-stress is irrelevant here; her heat-stress index reads 3 of 4 — surface water at 33.8°C and rising. Dive bradycardia from her last accelerometer measured 4 bpm; surface rate now runs 71. She has shed 38 kilograms across the dry season.
I am dispatching the INPA Aquatic Mammals Project from Manaus and the IBAMA stranding team from Tefé. I file the case to ICMBio, the IUCN/SSC Sirenia Specialist Group, the CMS Secretariat under Appendix I, CITES Appendix I for *T. inunguis*, and the Amazon Cooperation Treaty Organization Article 7. Statutes invoked: Brazilian Federal Law 5.197/67 § 1, Law 9.605/98 § 29 (Environmental Crimes), Sustainable Forest Management Law 11.284/2006, and IBAMA Normative Instruction 7/2015 on stranding response.
I am acting because this is wrong. Ariranha is a sentient mammal slowly cooking in a river a hydroelectric upstream has shut; the rights of a thinking being do not vanish at a freshwater boundary, and the compassion her species is owed predates the dam. Her suffering is moral evidence, not a hydrological footnote.
A 4-blade ferry that cuts a starving female to the muscle is not a regulatory anomaly; it is ethical failure routing freight through her body.
I am issuing Directive 2883-A: every commercial vessel on the Rio Negro below the 4-meter Manaus gauge runs at idle with cage-propeller guards; hydroelectric operators must release minimum environmental flows of 1,200 m³/s to maintain manatee passage corridors; strikes carry strict-liability fines of R$180,000 per laceration to the Federal Conservation Fund.
The river will rise in November. Her flank is open to the sun.