Table 1. Stranding information and microcystin (MCY) concentrations (ppb wet weight) for wild, microcystin-positive sea otters and captive controls.
| Animal number | Stranding date | Stranding region | Sample tested | MCY-RR | MCY-LR | MCY-Desmethyl LR |
| 1280-04 (Captive control) | 6/27/2002 | N/A | Liver | nd1 | nd | nd |
| 1485-06 (Captive control) | 11/14/2001 | N/A | Liver | nd | nd | nd |
| 3216-99 | 7/28/1999 | Monterey Bay | Liver | 1.36 | nd | nd |
| 3377-00 | 6/26/2000 | Monterey Bay | Liver | 2.04 | nd | nd |
| 3858-03 | 3/17/2003 | Estero Bay | Liver | nd | 11.8 | nd |
| 3955-03 | 5/8/2003 | Monterey Bay | Liver | 3.19 | nd | nd |
| 4240-04 | 6/5/2004 | Monterey Bay | Liver | nd | nd | 1.53 |
| 4294-04 | 8/25/2004 | Monterey Bay | Liver | 13.13 | nd | nd |
| 3110-98 | 5/14/2006 | Monterey Bay | Liver | 9.52 | nd | nd |
| 4811-06 | 8/25/2006 | Estero Bay | Liver | 7.71 | nd | nd |
| 4844-06 | 9/24/2006 | Monterey Bay | Liver | 3.62 | nd | nd |
| 4913-07 | 1/30/2007 | Monterey Bay | Liver | 61.58 | nd | nd |
| 5020-07 | 6/9/2007 | Monterey Bay | Liver | 38.45 | 348 | nd |
| 5023-07 | 6/9/2007 | Monterey Bay | Liver | 104.46 | nd | nd |
| 5036-07 | 6/25/2007 | Monterey Bay | Liver | 2.69 | nd | nd |
| 5082-07 | 8/16/2007 | Monterey Bay | Liver | 5.29 | nd | nd |
| 5108-07 | 9/23/2007 | Monterey Bay | Liver | 14.39 | nd | nd |
| 5167-07 | 11/21/2007 | Monterey Bay | Liver & feces | 18.7 & 16.4 | nd | nd |
| 5174-07 | 11/30/2007 | Monterey Bay | Liver | 6.18 | nd | nd |
| 5179-07 | 12/1/2007 | Monterey Bay | Liver | 3.76 | nd | nd |
| 5182-07B | 12/2/2007 | Monterey Bay | Liver | 4.8 | nd | nd |
| 5185-07 | 12/6/2007 | Estero Bay | Liver | 1.97 | nd | nd |
| 5416-08 | 11/8/2008 | Big Sur | Liver | 7.58 | nd | nd |
1
nd = microcystin concentration was below minimum detection limits on liquid chromatography-tandem mass spectrophotometry.