How many oil rigs in Russia?

Can you eat the bones in a rainbow trout? How do i tell a Male from female tiger fish? Why do pufferfish live in tropical seas and deep seas? What is special about the lungfish? Is a manta ray an amphibian? Do you think that there may be some closely related species of organism that cannot be identified with a classification key? Why is it easy to weigh fish? What does it mean if someone says rip your fishnets out? What is the lightest weight ladder? Are fisheries a renewable or nonrenewable resource? How fast does a 450 ltr go? What is the filet of a shark called? What do mantas eat? Which state of water allows fish to remain in a lake when winter temperatures are below 0C? How much should scallops cost? What other fish can you put with clown fish? Is seahorse invertebrate? Is a guppy a producer? Why are sharks so misunderstood? Why did mike trout skip high school?