Here’s why it’s called Cryptocoryne longicuada:
Longus is Latin for “long”, cauda is Latin for “tail”.
I’ve added a scale (in cm) to give you an idea of size – the spathe is almost 10 inches tall, with almost more than half of that being the tail itself – and its still got a couple of days worth of growth before it opens up. I expect it to put on another 2 inches before its all said and done.
I took the picture now vs. later for two reasons:
1) Once the spathe opens, the tail goes almost horizontal.
2) It’s almost touching the lid of the tank its in, no doubt it’ll touch it tomorrow and bend.

Wow really long tail…
Mines are stopped no flower this season.
Congrats.
Holy smokes that is impressive.
You gotta wonder what the functionality of that might be. Does the long tail make it easier for the insect pollinator to find its way?