What has made this print in the algae

[Big Boy Fish]

It seems to be a long wiggly pattern on the algae. All i have is a abino oscar, about 7 inches and royal pleco, about 3-4 inches. I have a relatively small tank, a 30 gallon that will be replaced any time soon (i know its too small). I also have 3 small snails, i dont know what they are and two apple snails. Ive recently got to small bits of bog wood along with two moss balls aswell

 

[connorlindeman27 27]

Cant really tell from the pictures but snails will "draw" squiggly lines on the glass.

 

[Big Boy Fish]

But it almost seems like something slithered over it

 

[Big Boy Fish]

But the i do have some baby snails hidden

 

[connorlindeman27 27]

But the i do have some baby snails hidden

Its likely the snails.

 

[Big Boy Fish]

Ok thanks

 

[Sgooosh]

the small snails might be nerites or ramshorns, they make that sort of pattern, it's like they are farming the algae

 

[FranciscoB]

Those are the traces of the raspings of the snail's radula upon the film of algae on the glass. The radula is like a conveyor belt 'tongue' full of individual teeth in rows.

 

[StevenF]

I have see that from my nerit snails in my tank. Basically they stop rotate ad the mouth consumes the Algae. They then move forward a little bit. and then rotate in the other direction and repeat. Other times they don't rotate and just move in one direction.

 

[Big Boy Fish]

Ok thank you