As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Retro Circles Background 4 No Black
Source GDJ
The image depicts polka dot seamless pattern.
Source Yamachem
Sort of reminds me of those old house wallpapers.
Source Tish
Prismatic Snowflakes Pattern No Background
Source GDJ
Looks like an old wall. I guess that’s it then?
Source Viahorizon
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Psychedelic Geometric Background No Black
Source GDJ
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS