noun🔗ShareAny one of numerous species of small fish of the family Gasterosteidae. The back is armed with two or more sharp spines. They inhabit both salt and brackish water, and construct nests from weeds."While exploring the shallow brackish water near the beach, we spotted a tiny stickleback darting among the seaweed, its spiny back glinting in the sun. "fishanimalbiologynatureorganismChat with AIVocabulary GamePractice Reading
