My home bred female Dwarf Gourami would spit water at me every time I open the top panel. But of course, if I don't feed her immediately, she'll stop spitting and move away. Food talks ! 
[video=youtube;e5Nnn_b7S0g]https://www.youtube.com/watch?v=e5Nnn_b7S0g[/video]

[video=youtube;e5Nnn_b7S0g]https://www.youtube.com/watch?v=e5Nnn_b7S0g[/video]