Fish are not mammals so YES messiah was a vegetarian. And John ate locusts and honey. John did not eat the locust insect. He ate what is called the Locust Bean it grows on the Corab tree in the middle east. So YES John was also a vegetarian.
The Elyon EL YAH creator of ALL things. Loves HIS Animals. In fact YAH feeds HIS animals. And communicates with HIS animals. And YAH gave HIS animals stronger attributes then HE gave to mankind. YAH gave HIS animals a stronger scent of smell. And stronger ears for hearing. And more powerful eyes for seeing. That is why Balaams donkey could see the Angel and Balaam could not. YAH told Elijah to hide in the rocks and HE would tell HIS ravens (birds) to bring Elijah bread in the morning for breakfast.
The Most High YAH says. When a man kills an Ox its as if he killed a man. For both are mammals. And both have the Ruach (spirit) breathed into them. So they live.
The animals and Adam and chavah were made on the 6th day. And both were made from the (DUST) of the ground. and BOTH return to DUST.
When Messiah ran all the animals and birds out of the Temple of YAH (YHWH) He did so because he was against animal sacrifice. For atoning for sin. They would sacrifice the animal and then sell the meat for the people to eat. This is why Messiah called them Robbers and Thieves.
Hosea 6:6 For I desire mercy and NOT animal sacrifice.
Psalm 40 King David Animal Sacrifice and burnt offerings you NEVER DESIRED Most High YAH. You have opened my ears, now I understand.
When I led your forefathers out of Egypt (mitsrayim) I NEVER commanded them to do Animal Sacrifices.
Psalm (tehillyim) 50 All the animals are MINE says YAH not yours !!! and you think that you can kill the animals that belong to ME !! to atone for YOUR sins!!!! oh you wicked people. When all I ask is that you call on my name YHWH the Mighty YAH and I will save you in the day of your troubles.
Jeremiah (YirmeYahu) chapter 8:8-9 The lying pen of the jewish scribes you pen down lies!!! according to your own wisdom, your own traditions. Your own rituals. And not according to the Most High YAHS instructions.
You liars!!! you deceive all the world with your lies!
Shalom :) much ahavah to you and may the ruach of YAH be upon you and may HE lead you closer to him.
Eat the good food that YAH gave us ALL. from the good of the earth. And live long and healthy. And take care of HIS animals. Be a good steward. And remove the blood guilt from your life. For when Moshiach arrives he will be able to SMELL your guilt.
The wolf shall eat with the sheep and the lion will eat straw like the ox. And the fear and dread of humans will be removed from all the animals in that day when Moshiach is HERE. And there will be NO MORE KILLING YAHS ANIMALS. And all will have true Love and Compassion for ALL living creatures. And they will eat from the good of the land that YAH gives. Shalom

I know this is a little late. I don’t think its overlooked. But it was customary to serve such delicacies for a guest, not customary for family consumption on a daily basis.

“And He commanded the multitude to sit down on the grass, and took the five loaves, and the two fishes, and looking up to heaven, He blessed, and brake, and gave the loaves to His disciples, and the disciples to the multitude.”

He took both the 5 loaves and the 2 fishes and prayed. Unless it is written in Scripture, we cannot assume fish was not served to the multitude, but we can search the scripture.

This is what is written in the KJV:

Matthew 15:36-37 :
“36 And he took the seven loaves and the fishes, and gave thanks, and brake them, and gave to his disciples, and the disciples to the multitude.
37 And they did all eat, and were filled: and they took up of the broken meat that was left seven baskets full.”

Jesus prayed over the bread and fish in both references. I do not think the Father ever denied Jesus what He asked for. We know that “meat” can mean “food” in the bible, but it appears that both the fish and bread were increased.

The NKJV says “fragments” instead of “meat.” I believe it is logical to conclude that God did not deny Jesus His request.

Thanks for the comment, however you may have skimmed through the above text where we address that. Did you read this part: “The assumption has been made that it was because the meat was offered to Babylonian gods. Yet the vegetables were also offered to the gods and Daniel ate those!”