Main Ref. | Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba, 1990 |
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Remarks | Sluggish. Seldom found on smooth, clean sand. Generally keeps far from shore. Forms small aggregations, but mostly solitary. Feeds on fish and invertebrates (Ref. 1371). |
Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
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Marine zones / Brackish and freshwater bodies |
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Substrate | Hard Bottom: rocky; |
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Substrate Ref. | |
Special habitats | |
Special habitats Ref. |
Ref. | |
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Associations | |
Associated with | |
Association remarks | |
Parasitism |
Feeding type | mainly animals (troph. 2.8 and up) |
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Feeding type Ref. | Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba, 1990 |
Feeding habit | hunting macrofauna (predator) |
Feeding habit Ref. | Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba, 1990 |
Estimation method | Original sample | Unfished population | Remark | ||
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Troph | s.e. | Troph | s.e. | ||
From diet composition | 3.90 | 0.25 | 3.83 | 0.35 | Troph of adults from 2 studies. |
From individual food items | 4.08 | 0.69 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
Ref. | Bowman, R.E., C.E. Stillwell, W.L. Michaels and M.D. Grosslein, 2000 |