Puzzle 31 - CLA SS Y

Puzzle:

[Solution: Teams realize the numbers are all HIN codes for US navy vessels – specifically SS, or submarines. Realizing that each submarine has an associated class (ex. SS-184 is a salmon-class sub), teams index the bracketed numbers into the class. This spells out the clue phrase “LINNAEUS,” clueing teams that the sub classes, which all happen to be marine animals, have biological classes as well. Indexing the underlined number in each sub ID backwards into the biological class (as indicated by the flavor text) allows teams to find the answer, YACHTS.

Note: SSN-615 can technically be classified as thresher- or permit-class, but the first round of indexing (where the rest of the letters spell out LINNAEU-) should confirm the correct class.]