Info
Tigrigobius is a genus of small, often strikingly colored gobies native to warmer parts of the east Pacific and west Atlantic,
Some species of Tigrigobius are known to act as cleaners.
Inhabits rock faces and tide pools (often under red algae), pilings and surfaces of large sponges.
Jumping guard
A jumping guard prevents (nocturnal) fish from jumping out.
Wrasses, blennies, hawkfishs and gobies jump out of an unprotected tank in fright if their night rest is disturbed, unfortunately these jumpers are found dried up in the morning on carpets, glass edges or later behind the tank.
https://www.korallenriff.de/en/article/1925_5_Jump_Protection_Solutions_for_Fish_in_the_Aquarium__5_Net_Covers.html
A small night light also helps, as it provides the fish with a means of orientation in the dark!