Data on growth and reproduction of right whale dolphins is limited. It is one of two species of right whale dolphins. Federal law prohibits vessels from approaching or remaining within 500 yards of a right whale. Long migratory periods, gestations, and time gaps between calves results in slow-growing right whale populations. One species of right whale occurs in California's waters. It is one of two species of right whale dolphin (genus "Lissodelphis"). NOAA Fisheries maintains an interactive map of recent right whale sightings. This call is relatively stereotypic among all right whale individuals and populations. They primarily targeted right whales, but began catching humpbacks as right whale catches declined. Actions involving the North Pacific right whale are subject to three separate laws. Relative to the other right whale species, "E. japonica" may be slightly larger. Right whale declines might have also reduced barnacles. By 1750, the commercial hunt of the North Atlantic right whale was essentially over. Many features are still unknown about current right whale population(s) in New Zealand waters. The greatest danger to the North Atlantic right whale is injury sustained from ship strikes.