FIGURE 2.

Comparative epidemiology data on metastases in agnathan versus gnathostome representatives that inhabit comparable carcinogen-contaminated aquatic environments. No metastases have been reported in hagfishes inside and outside Gullmar fjord. On the contrary, toothed belugas in Quebec as well as California sea lions that inhabit environments polluted with similar organochlorides are susceptible to metastatic tumors.