Check the tank conditions
Shrimp may explore near the surface, especially around flow or food. Repeated climbing or animals found outside the tank warrants a check of water quality, temperature, and oxygenation.
Inspect the lid for large gaps around cables and tubing. A cover can reduce escape risk while still allowing ventilation.
Fix the reason, not only the opening
Confirm the filter is running and test ammonia and nitrite if behavior changed suddenly. Review recent maintenance or product additions.
Do not seal the aquarium airtight. Maintain gas exchange and make sure any cover is secure without trapping excessive heat.
For your own tank
Check the aquarium rim after feeding and maintenance, when lids or airline tubing may have been moved. Repeated climbing can point to a water or oxygen issue, so do not rely on a cover alone. Keep ventilation and temperature in view.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.