This card's name references profanity, with the "!" replacing the "i" in "Fish" referring to how some swear words may be censored by replacing letters with symbols.
This card's Japanese name is a pun between "shock/fright" and "fish", which can both be pronounced ギョッ gyo.
It may also reference the Japanese horror manga Gyo, in which fish begin to crawl on land thanks to machines powered by their internal gases. In a famous scene, the main characters are attacked by a shark on dry land.