[JAVA]
seed: 1500050556
version: 1.16.1 (should work 1.13-1.17 roughly)
coordinates: 91x 16y 65z
Found by me (Drakou111)
This is especially rare, since you need 2 sugarcane feature to spawn on each other, and each need a water source next to it. My estimate for a 5+ sugarcane is roughly 1 in 200,000,000 of ocean chunks.
by Wrong_Mycologist6428