A form may pertain-to a dorsal fin.Logical formLearned from3 sentences. A side may pertain-to (tail fins).Logical formLearned from3 sentences. Pelvic fins may have some rays.Logical formLearned from3 sentences. Some dorsal fins can be on a half.Logical formLearned from3 sentences. Fins can be developed.Logical formLearned from3 sentences. Fins can be adjustable.Logical formLearned from3 sentences. A front may pertain-to an anal fin.Logical formLearned from3 sentences. (Fin spines) can be sturdy.Logical formLearned from3 sentences. A (gulper shark) may have an anal fin.Logical formLearned from3 sentences. A caudal fin can be notched.Logical formLearned from3 sentences. An anal fin can be small.Logical formLearned from3 sentences. Fins may be lost.Logical formLearned from3 sentences. Pelvic fins may have margins.Logical formLearned from3 sentences. A (metal fin) can be vertical.Logical formLearned from3 sentences. Some fins may be located.Logical formLearned from3 sentences.