Marine Pests & Threats Crossword Puzzle

QUESTIONS LIST: bleaching : the effect of substantial changes of temperature, acidity or light on coral, turtle : an aquatic reptile especially affected by human impacts, cruises : large boats that create disturbing noises to ecosystems and meddle with sound reliant animals, invasive species : an organism that has been introduced to an environment that it is not native to, ballast : heavy materials (including gravel) used to stabilise water vessels, can cause serious problems if spilled, crown of thorns : a marine pest in the echinoderm phylum that wreaks havoc on the great barrier reef, global warming : the planet's temperature rising, mainly due to fossil fuels and greenhouse gases, endangered : when a species is close to going extinct, ocean : the large mass of salt water that makes up 70% of our planet's surface, oil : a petroleum substance that causes suffocation to fish if they eat it, conservation : attempts to prevent or minimize damage done to wildlife, overfishing : the act of taking more fish/crustacean than is healthy/sustainable for the ecosystem, pollution : harmful manmade substances being injected into the environment. is bad