Both emotions are characterized by similar central nervous system arousal. In large part, it is our psychological interpretation of arousal feelings that determines whether we will feel fear, anger, or a combination of both. We said above that anger is a sort of transformation of pain, a category including fear feelings as well as physical pain. Considered physiologically (from the perspective of the body), there are a great number of common characteristics shared by anger and fear.
Dolphins eat a variety of different foods. Some of them eat fish, such as mackerel, herring and cod, while others eat squid. Large dolphins, such as Orcas may eat other marine mammals, such as sea lions or sea turtles. How much a dolphin eats depends alot on what type of fish or ssquid they eat. Some fish, such as mackerel or herring, have alot of fat in them. This means that a Dolphin will get alot of energy from eating these fish.
Scallops filter plankton from the water internally. Squid eat small fish which eat plankton, and even the mighty humpback whale dines on small fish which eat plankton. Higher on the food chain, sharks eat fish, which eat smaller fish, which eat plankton. Without zooplankton, small fish would starve, and without them, the larger fish would starve. So, nearly everything in the ocean somehow depends on the zooplankton.