Phono-semantic compound (形聲): semantic 魚 (“fish”) + phonetic 安 (OC *qaːn) – a kind of fish.
Found in ancient Chinese as corruption of 鰋 (changing 匽 to 安) and originally meaning a kind of catfish. Later, independently coined in Edo period Japan in word 鮟鱇 (ankō, “monkfish”) from ateji安康 (ankō) by adding the 魚 (“fish”)radical to each of the ateji characters. As found in Chinese, not considered a Japanese kokuji coinage, though 鱇 is kokuji, as it is not found in Chinese. Subsequently borrowed into Chinese from Japanese, both in compound 鮟鱇 and as isolated 鮟.