bullheads: 69 phrases in 14 subjects |
Biology | 12 |
Construction | 1 |
Fish farming pisciculture | 2 |
Ichthyology | 36 |
Maritime law & Law of the Sea | 1 |
Nautical | 1 |
Oceanography & oceanology | 3 |
Oil / petroleum | 2 |
Oil and gas technology | 3 |
Sakhalin | 2 |
Slang | 2 |
Technology | 2 |
Thermal engineering | 1 |
Zoology | 1 |