Table 2.

Summary of the Behavioral State Score (BSS) criteria. The score ranges from zero to five with zero that is the least active/no movement, while five indicates the highest movement with active locomotion.

Behavioral State Score	Activity correlated
0	Body is retracted and operculum is closed, snail is completely still and hidden.
1	Operculum is ajar but the snail is withdrawn while demonstrating no locomotion.
2	Operculum is ajar but the snail is still withdrawn while allowing their antennae to exit the operculum and moving them about.
3	Snail is more active, the operculum is open and the snail has exposed its head.
4	Snail exposes both head and foot while it conducts movements to re-orient itself.
5	Snail is full extended with its head and foot out while demonstrating active locomotion.