Alevin is a term used to describe a newly hatched fish, specifically a salmon or trout. However, there are several synonyms used to refer to this tiny creature. These include fry, newly hatched fish, fingerling, smolt, and parr. The term fry is commonly used to describe a young fish that has recently hatched from an egg. Fingerling refers to a small fish that is around two to four inches in length. The terms smolt and parr refer to specific developmental stages of salmon and trout, respectively. In any case, these synonyms all describe alevins in various stages of development and can be used interchangeably depending on the context.