1Whitebait: small juvenile fish (often anchovy-type fry) eaten as food, commonly boiled (kama-age) or dried—famously used in dishes like shirasu-don.
休日のランチにしらす丼を食べに行った。
I went to eat a shirasu rice bowl for weekend lunch.
釜揚げしらすをたっぷりのせていただく。
I enjoyed a generous serving of freshly boiled shirasu on my rice.
スーパーの鮮魚コーナーで新鮮なしらすを買った。
I bought fresh shirasu at the supermarket's fish section.
2Elver: the juvenile stage of eels (elver or glass eel); the term is used in fisheries contexts to refer to young eels.
春になると川にしらす（ウナギの稚魚）が上ってくる地域がある。
In spring, there are areas where elvers (young eels) migrate up rivers.
漁師はしらす（ウナギの稚魚）を保護する取り組みを行っている。
Fishermen are working to protect elvers (young eels).