Give scientific reasons.
Our body irritates if it comes in contact with jellyfish.

Explanation

i. The mouth of jellyfish is surrounded by tentacles.
ii.The tentacles possess cnidoblasts which are used for capturing prey or for defense.
iii. When our body comes in contact with the tentacles of jellyfish, these cnidoblasts penetrate our skin as a defensive action.
iv. Cnidoblast injects the toxin in our body and thus, our body irritates if it comes in contact with jellyfish.