Found this kind of interesting. I saw my nassarius snail hanging upside down from the water surface briefly before falling down to the sand bed. Watched him head straight for the glass and go right back up, so I broke out the phone to record him. Sure enough he did the same thing. Thought it was kind of entertaining and amazing the water has enough surface tension to support him. He seems to be a competition with himself to see how far he can make it across.
One minute shaky video link for your daily entertainment below.
One minute shaky video link for your daily entertainment below.