Helminth Load in Feces of Free-Ranging Blue and Fin Whales from the Gulf of California.

Introduction: This is the first worldwide systematic and quantitative study to count and identify helminth parasites from 100 blue and 44 fin whale fecal samples collected in the Gulf of California during winter (1993-2014).

Results: Blue and fin whale feces had similar prevalence of adult acanthocephalans (Bolbosoma sp.) in feces (18.