chance; opportunity; lucky break
Idiomatic expression literally meaning 'a shoal to float on', used for a rare chance or lucky opportunity that comes one's way. Often appears in set phrases like 浮かぶ瀬がない (no chance in sight) or 浮かぶ瀬があれば (if a chance arises).
There's no lucky break in sight at my current company, so I'm thinking of changing jobs.
If a chance comes your way, please let me know.
Literally 'a shoal (瀬) that floats up (浮かぶ)', originally referring to a sandbar or shallow area that appears in water, providing a place to rest. Metaphorically extended to mean a rare opportunity or lucky break that emerges in difficult circumstances.