the first image looks like a big ball of bonies. kelp on the bottom (near the front edge of the fish ball). possible wolfpack of YT at 70-80. the micro yt usually don't school up THAT tightly which is why i'm guessing they are bonito. and from what i've noticed.. yt have a thicker mark (some yellow on each arch, according to your FF).
then again.. it could be a big ball of some decent sized macs. i'm not expert at reading a FF, i just drop down when i see a decent sized ball/mark and my rod will tell me what it is if it bites lol.
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