heh, you have my sympathy on that.
@ the OP
What you have, when it comes to seahorses, is a stacking level of rarity.
The ancient SoS is pretty rare, so it's hard to get a net - especially if there aren't many people fishing much in the first place.
The leviathon only drops an arti sometimes
Even when it does, it's very rarely a seahorse or anchor, mostly you get the same stuff as you do off Ilsh paragons.
which makes the darn things about as rare as hen's teeth.