stripe – n. a long, narrow line of color

fin – n. a thin flat part that sticks out from the body of a fish and is used in moving or guiding the fish through water

toxic – adj. containing poisonous substances

expedition – n. a journey especially by a group of people for a specific purpose (such as to explore a distant place or to do research)

gut – v. to remove the internal organs from (a fish or an animal)