Final answer:
Aquatic foods such as fish, clams, and kelp are rare in the diets of primates. Most primates prefer fruits and occasional animal proteins but do not typically access aquatic resources. Humans are the exception, having historically included seafood in their diet, although sustainable fishery practices remain a challenge.
Step-by-step explanation:
Among primates, aquatic foods such as fish, clams, and kelp are rare items in their diets. While most primates are omnivorous, with a preference for fruits and some consumption of animal proteins, aquatic resources are not a common part of their diet. This may be due to their habitats and the general inaccessibility of such food sources for non-human primates.
Humans, however, do have a history of exploiting aquatic resources for food. Fish and other seafood have been an important part of human diets in various cultures, especially for those living near water bodies. Despite this, even humans can face challenges in sustainable fishery management, which further emphasizes the rarity of aquatic foods among non-human primates.
Non-human primates are known to use tools, like sticks, to aid in obtaining food, but these are typically used for gathering fruits or hunting small land-based animals, not for aquatic feeding purposes. Therefore, the inclusion of fish or kelp in their diets is a notable deviation from their common feeding habits.