What do orcas eat?

Question 14: What are some predators of leatherback sea turtles?

Step 1: Adult leatherback sea turtles are large, so they have few natural predators.
Main predators: killer whales (orcas) and large sharks.

Step 2: Specific examples include great white sharks and tiger sharks, which attack adults in the ocean.

Final answer: orcas, great white sharks, tiger sharks
$\boxed{orcas, great white sharks, tiger sharks}$

Question 15: What do orcas eat?

Step 1: Orcas (killer whales) are apex predators with an opportunistic diet.

Step 2: They primarily eat fish (like salmon and herring), squid, and marine mammals (seals, sea lions, dolphins, porpoises, other whales).

Step 3: Additional prey includes sharks, sea birds, and sea turtles (including leatherbacks).

Final answer: fish, marine mammals, squid, sharks, sea turtles
$\boxed{fish, marine mammals, squid, sharks, sea turtles}$