Newbie questions

[BigTunaL]

Still learning here and have a lot more to go. This forum has been a great and fun learning tool for me and many others, so a big thank you to all those who share their stories, tips, and experiences.
Questions:

Making bait: I cut my sabiki to 3 hooks, but I still have a heck of a time when I hook 2 or more macs and getting them into my tank. Do you guys use any dehooker or have a technique?

"Greenies" are obviously the green with stripes and Spanish are less colorful ones, correct?

Sonar: Any tips for optimal settings when targeting yellowtail?

I paddled quite a lot last week in Carlsbad and yet I was not able to go past 84' of water, how do you target deeper areas if you don't have any way points already set?


Thanks