Avoidance of these areas could result in longer migration times for certain species. Noise from the devices may affect navigation and communication of marine mammals and may cause other organisms to avoid or be attracted to the area. Another one is that magnetic and induced electric fields may affect navigation of salmon, crabs, some fishes and elasmobranches (sharks and rays). Lighting of the surface elements of the devices may affect sea birds in that they may be attracted to the area, avoid the area, or be confused about their location relative to shore. Avoidance of the area may result in longer migration or forage times.