I guess quattros are the only 'long' fin that hockey players use these days. Helping out on freediving courses though has opened my eyes to several kicking styles that can only be described as unique. Like kicking a pair of these like they were split fins

Long fins just don't suit quick acceleration and manuvering, the lifeblood of hockey. My spearfishing fins may be great for efficiency, but you'll be doing three-point turns like a bus if you try them in a game. Plus they're carbon fibre and would probably slice a few people open while you're turning