| Main Ref. | Maitland, P.S. and R.N. Campbell, 1992 | ||
| Predator stage | juv./adults | ||
| Food I | zooplankton | ||
| Food II | fish (early stages) | ||
| Food III | fish eggs/larvae | ||
| Food group | Percopsidae | Prey Stage/Part | eggs |
| Food name | trout eggs | ||
| Commonness | 3.4 | rare (1-5%) | |
| Country | UK Engld Wal | ||
| Remark | Locality: Llyn Alaw. Between October and February; no. of fish examined=38. | ||