A photo of Russia's Ropucha-class landing vessel, the Minsk, was revealed on Crimea's Telegram channel, Krymskiy Veter.
Ukraine conducted a nighttime attack on a dry dock in Sevastopol, Crimea, on September 13.
Oryx, an open-source intelligence group, confirmed severe damage to the Minsk, suggesting it cannot be restored.
Ukraine's attack also resulted in the loss of the Russian KILO-class submarine Rostov-on-Don, which was docked at the Sevastopol shipyard.
Sevastopol's Russian-installed authorities reported a fire at the shipyard following a massive missile attack by Ukraine.
The Russian Ministry of Defence claimed to have intercepted seven out of ten Ukrainian cruise missiles and maritime kamikaze drones.
Ukraine's Air Force Commander, Mykola Oleshchuk, hinted on social media that Ukrainian aircraft carried out the nighttime attack.
He expressed gratitude to the pilots for their role in the operation.