The given bar graph illustrates variations in seal, whale, and dolphin populations from 2006 to 2018, with intervals of four years in Georgia Street. As reflected by the y-axis, the population is measured from zero to 60 animals with intervals of ten. Overall, the bar graph reveals that dolphin populations rose gradually, seal populations showed some fluctuations, while whale populations remained relatively stable. Another significant detail is that the populations of sea mammals were by far the lowest in 2010 and highest in 2018.
Looking at the details, the count of dolphins was about 17 in 2006. They climbed from 17 to 21 in 2010, then the number of dolphins rose to around 31 in 2014 and finally reached the highest population of all sea creatures in 2018, at approximately 48 dolphins. Conversely, seals halved dramatically from 46 to 23 in 2010, but again indicated growth in 2014, reaching around 34. In 2018, seals observed the highest numbers during the four-year period, around 42.
Regarding the whale populations, they remained nearly constant throughout the given periods, numbering closer to the mid-20s. Furthermore, the lowest overall populations for these aquatic animals can be observed in 2010, with an average of 23, and the highest in 2018.