@REtroGeekery
@Freizeitfarmer
@esmey_cx
Boy am I about to make your guy's day
Legendary fish ponds are being added in 1.6.9, you can partake in the public beta of 1.6.9 to mess around with them now as they're being worked on
They're not as complex as this post designed them to be but allow for collecting more roe types (in bulk vs one off with jewels of the sea) and have a limit of 1 per pond so you can't get more legendaries infinitely (in an intended way) and so it balances their roe production to be more like lava eel level