Mouse

so, yea, i found a mouse in the underworld. i saw it earlier on my trip there, in the underground, but it decided to jump into lava. i don't know much about the mouse other than it is fast, and my world is before hardmode so he spawns than, he is harmless. i don't know if he drops anything or if he gets corrupt. the only sure thing is that he is a fast little critter, and his health. in this picture his health is 5. any of you people who knows how to get the info, could you research the mouse more. i don't know how to code this website right and i wanted to tell you all about my find. please delete everything i said once better info is found.