Taranto's bombs, fuel dumps, and reconnaissance threat

Why were no bombs used at Taranto?

Bombs were used. They damaged cruisers and destroyers and attacked fuel dumps and the seaplane facilities whose aircraft could have searched for the British force.

Bombs were used at Taranto alongside torpedoes. They damaged cruisers and destroyers and attacked fuel dumps. Seaplane hangars were another important target because their reconnaissance aircraft could have searched for the British force. Attacking those aircraft and their facilities reduced the threat of the carrier being located after the raid.