silver carp, hypophthalmiathys
鰱 centers on a specific freshwater fish: the silver carp, also known by its scientific genus Hypophthalmichthys. The meanings are tightly focused on this one fish species.
鰱 combines the fish radical 魚 with 連, which likely provides the sound レン. The character was created to name the silver carp, a fish associated with the sound 連.
The left side 魚 means fish, and the right side 連 suggests a chain or link. Picture a chain of silver carp swimming in a linked line, their scales flashing.
For レン, imagine a silver carp leaping in a chain-linked pond: the first syllable of 'leaping' cues レン, and the fish's linked movement ties to the right-side component 連.