Difference between "Health Monitors" and "service port"

I meant what is the tmsh for pool creation if I want to inherit address and port from pool member. The pool nodes listen on port 8080 and I want to create the pool by tmsh as initially asked. Below I have also created a monitor that checks port 8080 in case I need to apply it to the health monitor.

ltm monitor tcp app_monitor_8080 { adaptive disabled defaults-from tcp destination *:webcache interval 5 ip-dscp 0 time-until-up 0 timeout 16 }