Which was the first camera to use a lens? Which invention revolutionized plant breeding? Which are the oceans of the world? Which is the largest ocean? Which is the coldest ocean? Which is the warmest ocean? Which are the largest ships built today? Which form of sea travel is the most luxurious? Which people use fire for fishing? Which fish has a headlight? Which fish uses a hammer to hunt? Which sea animal is a singer? Which animal moves by jet propulsion? Which are largest animals in the ocean? Which fish has a torchlight? Which creatures live at the bottom of the ocean? Which is the biggest coral reef? Which are the two main kinds of sea mammals? Which are the deadliest sea creatures? Which crab moves house? Which is the longest fish in the sea? Which whale has an unusual tooth? Which fish has fangs? Which is the smallest fish in the sea? Which predator looks like a plant? Which fish has a fishing rod? Which fish is not hurt by the sea anemone’s sting? Which is the fastest fish? Which animals have the biggest shells? Which sea creatures are in danger? Which are the Greenhouse gases? Which is the highest tsunami recorded? Which are the main ocean currents?
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