Here’s an older video of a relatively well known fire incident, but surprisingly the video has very few views on Youtube.
It shows a Croatian CL-415 amphibious water bomber aircraft fighting a fire onboard the Turkish Ro-Ro MS UND Adriyatik, which caught fire in February 2008 off Croatia while sailing from Istanbul to Trieste, Italy. Ultimately, the aircraft was not very effective in fighting the fire, but tugs were on-hand to help spray water on the blaze.
The CL-415, aka the Bombardier 415 Superscooper, is a purpose-built amphibious water bomber used to fight fires from the air. In the video, you can see exactly how it got its name: because it scoops up water and then bombs it wherever it is needed.