Here's how I made a betta fish charm on my rainbow loom. Some parts are speeded up to bring the video under 15 min, but you can still understand me.
Silver tone goldfish/betta fish charms connected via jump ring to gunmetal gray french hook ear wires. Beautiful and ornate fish charms, measure 1/2 cm across and 1 cm in length. Earrings have a dainty and natural swing and flow, and would make a wonderful compliment to any outfit! Fish charms have great dimensional detail.