noun
Rouleina watasei; a type of slickhead fish
A specific deep-sea fish species. The name is a taxonomic designation; in everyday contexts it is a specialized term.
セキトリイワシは深海魚の一種で、あまり市場に出回らない。
The sekitoriiwashi is a type of deep-sea fish and rarely appears in markets.
The name likely combines 関取 (sekitori, a sumo rank) and 鰯 (iwashi, sardine), but the exact origin is uncertain. It may refer to the fish's appearance or a local naming tradition.