Can you eat caviar
No. In Jainism, the principle of ahimsa (non-violence) leads most Jains to follow a strict vegetarian diet that excludes all animal products, including eggs. Caviar is fish eggs, and consuming it would involve harming or exploiting animal life, which goes against Jain dietary vows.
There are variations in practice between Digambar and Shwetambar traditions, but both typically discourage or prohibit eggs. If you have a specific Jain community or family tradition in mind, I can explain how they apply the guidelines.