The 8-year-old male died from hemorrhagic pneumonia.

The Cheetah Conservation Station at the National Zoo is mourning the loss of a beloved member.

On Monday, the zoo confirmed the death of the male cheetah, Justin. The big cat, nicknamed "Gat," passed away on Wednesday, March 3, following a brief spell of bacterial bronchitis he was diagnosed with in late February. After showing promising signs of recovery, the animal collapsed in his enclosure and could not be revived. His death was caused by hemorrhagic pneumonia. He was 8 years old.

Born at the Smithsonian Conservation Biology Institute in 2012, Gat made his home at the National Zoo, where he and his sister, Carmelita, were hand-reared by staff after facing abandonment by their mother. Both cubs were named after Olympic track stars Justin Gatlin and Carmelita Jeter, who famously visited the siblings. Gatlin is credited by the zoo with coming up with his signature nickname, "Gat the cat."

We're sad to share that our 8 y.o. male cheetah Justin (nicknamed “Gat”) died unexpectedly Mar. 3 following a brief illness. Gat was hand-raised by keepers and enjoyed training + playing with enrichment toys. Our team misses him dearly. LEARN MORE: https://t.co/NRupWZsxON. pic.twitter.com/jDMHlyJelZ

— National Zoo (@NationalZoo) March 8, 2021

Gat is remembered for his big heart and lovable personality. Zookeepers who cared for him spoke of the strong bond they shared, particularly his endearing playtime habits and rumbling purr. During his time at the zoo, he also served as an animal ambassador, which comes as no surprise from his loving keepers, who claimed he showered them in affection—more so than other cheetahs!

Cheetahs are considered a vulnerable species, according to the International Union for the Conservation of Nature. Anywhere between 7,100 and 10,000 are projected to live in the wild, with the animals facing severe threats from human conflict and habitat displacement.

Gat seemed like an amazing feline, so we're absolutely heartbroken to hear this unfortunate news. We send our regards to the National Zoo's staff for their untimely loss. You can read their full statement here.

Did you ever visit Gat at the National Zoo? Have a favorite memory you'd like to share with us? Leave a comment—we would love to hear from you.