Unheard taming tips, do what you must:

*Their aggro is crazy, but you can always use a Pachyrhino to help you get their attention and then calm them down. Re-redering also works, but only if the taming proccess wasn't started.

*Sanguine Elixir makes the whole ordeal easier, but as with any passive tame, you must feed it the first time with taming food AND wait until it is ready to be feed again to use the Elixir.

*For fishing aid, you can use Wooden Cages and Giant Bee Honey. Cages will hold fish, honey attracts them. Honey usage can therefore be undesired, but cages are always useful.