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| brown bullhead (Ictalurus nebulosus); common bullhead (Ictalurus nebulosus); northern brown bullhead (Ictalurus nebulosus) | |||
| American catfish (Ictalurus nebulosus); brown bullhead (Ictalurus nebulosus) | |||
| channel catfish | |||
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| ictalurids | |||
| американский сомик: 5 phrases in 2 subjects |
| Biology | 2 |
| Ichthyology | 3 |