1)
Why does it say "u'Ntashticha"?
1.
Malbim: This is like a fish that dies when it comes to the dry land. I.e. there I will abandon you, and you will die by yourself.
2)
What is the meaning of "Atilecha"?
1.
Radak: I will cast you. This is like "va'Yatilu Es ha'Kelim" (Yonah 1:5).
3)
What is the significance of "v'Hishkanti Aleha Kol Ohf"?
1.
Malbim: A Mashal for this is a great fish that the water expelled it; birds can eat it. I.e. all of them will plunder its spoils.