I could not find the second seagull unless you mean his shadow or was that was carved into the table.
Your post brings back memories for me. Geez, its decades now since I was in Barcelona. A place like nowhere else but I do remember having to keep my hand on my wallet there. But still great food and art:)
This just in. Eureka! Found the second seagull perched on top of the fountain.
Good job, hehe.