Any way to cover this easily?

[gizzo12]

Hello! I plan on getting a wrasse soon (just waiting for it to come into my lfs) but I am worried that this back part of the tank being open will allow it to jump as I know they will fit through even the tightest spaces. I want something to cover this with that can also be easily installed and removed when needed. Any ideas or suggestions?

 

[vetteguy53081]

I use fish bags for such gaps. Bubble wrap also works and can be trimmed with scissors

 

[Dw79]

Velcro on some neting and the edge of your tank