I do not know why it occurred to me to think "will there be a fish smaller than my hand?" I started to search the internet and I got this.
"The smallest fish in the world is the Trimattum Nanus of the Chagos Archipelago, measuring 8.3 millimeters (0.33 inches)."
I looked for pictures of this fish and I found a variety but this was the one that attracted my attention the most.
good posting
Thanks.