Question

Shark Families Dichotomous Key
1. A. Body kite-like in shape (if viewed from the top) .................................. Go to statement 12
B. Body not kite-like in shape (if viewed from the top) ............................ Go to statement 2

2. A. Pelvic fin absent and nose saw-like ...................................................... Family Pristiophoridae
B. Pelvic fin present .......…........................................................................ Go to statement 3

3. A. Six gill slits present ...........................................................................….. Family Hexanchidae
B. Five gill slits present ......................................................................…….. Go to statement 4

4. A. Only one dorsal fin ..........................................................................…... Family Scyliorhinidae
B. Two dorsal fins ..................................................................................... Go to statement 5

5. A. Mouth at front of snout…………..........……………………………………….…….… Family Rhinocodontidae
B. Mouth on underside of head ............................................................... Go to statement 6

6. A. Head expanded on side with eyes at end of expansion ……………….….. Family Sphymidae
B. Head not expanded .............................................................................. Go to statement 7

7. A. Top half of caudal fin about the same size as bottom half …………….... Family Isuridae
B. Top half of caudal fin different in size than bottom half ……….…………. Go to statement 8

8. A. First dorsal fin very long, almost ½ total length of the body….………… Family Pseudotriakidae
B. First dorsal fin regular length ……………………..................................…….. Go to statement 9

9. A. Caudal fin very long, almost as long as entire body ………………………... Family Alopiidae
B. Caudal fin regular length ................……………………………………………....…. Go to statement 10

10. A. A long needlelike point on end of nose ............................................... Family Scapanorhynchidae
B. Nose without long point ...................................................................... Go to statement 11

11. A. Water fin absent ....................................……………………………………….…..... Family Squalidae
B. Water fin present ..........................................……..................................... Family Carcharhinidae

12. A. Small dorsal fin present near tip of tail .......................

Answer 1

what am i reading....

Answer 2

go through the steps and figure what kind of shark it is

Answer 3

Alopiidae this is what i think

Answer 4

Yeah

Answer 5

ok