"Azure a sea-unicorn proper Or a mantling Azure doubled Or"
The heraldic mythological bestiary includes a wide series of creatures, hence the sea-unicorn (simply attaching a fish tail to the well known unicorn). Following this technique you can simply obtain a sea-lion, sea-horse, sea-griffin etc.
It represents authority, intelligence, adaptability, spirituality and a very close relationship with the sea (also represented by the Azure [blue] background). The sea-unicorn is Or [gold], a link with the sun and it's radiant splendor.
I chose this to be my shield. Used Wikimedia stock.