A fluorometric sensor for detection and identification of biogenicamines with carboxylic acid modified tetraphenylethenes (TPEs) based on aggregation‐inducedemission (AIE) is reported. A mixture of the carboxylic acid substituted TPE and biogenicamines displayed a blue emission on aggregation, which serves as a “turn‐on” fluorescent sensor for the amines, the degree of fluorescence enhancement being