Could he be a vegetarian?

So far, Isaac's diet only included mainly fruits and vegetables. I tried cooking fish in his porridge but he just doesn't take it at all. I think the smell and taste may be too strong for him and since then, I have stopped giving him fish. He is currently taking the following :

• Sweet potato puree
  
• Potato puree
  
• Pumpkin puree
  
• Apple puree
  
• Pear puree
  
• Bean curd
• Peas puree
  
• Brown rice cereal
• Oats and prune cereal
  

Thinking of adding this to his diet :

• Fresh silver fish
• Broccoli
• Dried scallops
• Tomato
• Rolled oats