What is planktain?

How do you change the clutch on a Peugeot moped103? What type of fish is it it is pink and round with no tail but two fins and are quite aggressive? Why is it that people cannot breathe under water but a fish can? How does a dolphin stay away from pray? Do angelfish and neons need a heater? What are the legendary sharks and octapuses names? Who eat guppies? Will cranes eat koi fish from backyard ponds? What color is a goblin shark? How do you tell a goldfish from boy to girl? What happens to the organisms in water when it gets cold? How chlamydomonas is useful to human beings? Do mandarin fish need to live in salt water? How does salmonella cause diarrhea? Is pollack fish is halal? What would happen if all sharks became extinct? Can bettas live in betta bowls? What do the draughtboard shark eat? Is a whale shark a carnivore herbivore or omnivores? Figure Eight Puffer problem I have 3 Figure 8 puffers and one of them cant keep its tail straight and lies on the bottom it tries to swim but cant his tail is just curved up Whats wrong?