When she was young, she got hunted by a wild Orca. While those encounters are often deadly for mermaids, she fortunately got saved by fishermen on the shore, though the toll to pay was high: her tail was was almsot ripped off and way beyong any mending.
Thanks to state of the art technology, she thankfully got a new tail when grew up, which let swim freely in the seas again. Her fear of Orcas is still high, but she doesn't want to let her stopped because of that!
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This pic is supported by www.patreon.com/Gammatelier?ty… ! Someone got his idea drawn after a poll. Hope you like it !