The first 節気 “sekki” division of the traditional Japanese calendar is:
the beginning of spring
The last of the three “kō” microseasons within this division is:
“uo kōri o izuru”
Fish emerge from the ice
That makes 魚上氷 the third microseason of the year!
It typically lasts 14~18 February.
This one is comprised from three quite common kanji:
[ギュ], (うお), (さかな)
“gyu”, “uo”, “sakana”
[ジュウ], [シュウ], (うえ), (かみ), (あ・げる), (あ・がる), (のぼ・る), (うわ)
“jū”, “shū”, “ue”, “kami”, “a・geru”, “a・garu”, “nobo・ru”, “uwa”
top, up, upper part, rise, go up, climb up
(こおり), (ひ), (ひょう)
“kōri”, “hi”, “hyō”
This is #3 in a regular subseries of 365 Days of Japanese, where every five or six days I post about a Japanese microseason that has begun around the same date as the entry. I am taking all information from the list in this article. There is also a 36 microseason list here, which may be more authentic (rather than being based primarily on Chinese sources).
Image credit: The University of Oregon article ‘Antifreeze’ in Antarctic fishes keeps internal ice from melting.