Question

dorsal fins anal fin pelvic fin gill slits pectoral fin pelvic fin pectoral fin pectoral fin ventral intro dichotomous key start over question 1: does the specimen have a jawless, circular - shaped mouth? yes: lamprey no go to question 2. what is the fish’s species? cow shark flounder goblin shark halibut lamprey manta ray sawfish skate thresher shark done 11 of 12

Explanation:

The specimen (shark - like) doesn't have a jawless, circular - shaped mouth (so we move to further questions in the dichotomous key). Among the options, the thresher shark has a long tail (as seen in the top shark illustration with a long tail) and shark - like features. Other options like flounder, halibut are flatfish, lamprey is jawless (eliminated by first question), manta ray, skate, sawfish have different body structures. Cow shark and goblin shark also differ in features, while thresher shark matches the shark - like body with a long tail (thresher shark is known for its long tail) shown in the diagram.

Answer:

thresher shark