This is also dropped by deathworm.

Use this when fishing for great drops!

I don’t know the chances but on mobile you can rarely get leech blood in free gift boxes.

On mobile leeches are one of the rarest creatures in game in fact of 3 years of playing this game I only had 2 encounters with them and I go into the swamp very often.

If you want to attack a leech first get a araneo with a saddle ride the araneo so it doesn’t stick on you

If you kill big corrupted dinos like T Rexes or Spinos they give you leech blood for some reason.

you can farm thousands of these in the bug cave in the island with a megatherium

Using a wooden club will give you so much more! Saves a ton of time

You cannot extend leech blood spoil time by any means, except on a fishing pole, which is lame.

Be prepared to use immediately it for fishing or whatever and just craft antidotes with the rest. Antidotes can be stored in the preserving bin.