A (fin disk) can be flattened.Logical formLearned from3 sentences. A (fin disc) can be rhomboid.Logical formLearned from3 sentences. Pelvic fins can be rounded.Logical formLearned from3 sentences. A caudal fin can be elongated.Logical formLearned from3 sentences. A position may pertain-to a dorsal fin.Logical formLearned from3 sentences. A (fin disc) can be wide.Logical formLearned from3 sentences. A tail can be with (fin folds).Logical formLearned from3 sentences. A ray may have a (fin disc).Logical formLearned from3 sentences. A stingray may have a (fin disk).Logical formLearned from3 sentences. A dorsal fin can be serrated.Logical formLearned from3 sentences. A dorsal fin can be arched.Logical formLearned from3 sentences. Fins may undergo a loss.Logical formLearned from3 sentences. Some fins can be hyaline.Logical formLearned from3 sentences. A dorsal fin may contain some spines.Logical formLearned from3 sentences. A dorsal fin can be upright.Logical formLearned from3 sentences.