A (tail fin) can be large.Logical formLearned from3 sentences. Species may have a dorsal fin.Logical formLearned from3 sentences. Caudal fins can be black.Logical formLearned from3 sentences. A fin can be slender.Logical formLearned from3 sentences. Fins can be dark.Logical formLearned from3 sentences. Fins can be brown.Logical formLearned from3 sentences. A fin can be narrow.Logical formLearned from3 sentences. Fin may be swept.Logical formLearned from3 sentences. Fins can be short.Logical formLearned from3 sentences. Pectoral fins may allow for cruisings.Logical formLearned from3 sentences. A position may pertain-to pectoral fins.Logical formLearned from3 sentences. Margins may pertain-to pectoral fins.Logical formLearned from3 sentences. A (fin disc) can be angular.Logical formLearned from3 sentences. A (fin disc) may pertain-to a whipray.Logical formLearned from3 sentences. A dorsal fin can be recognizable.Logical formLearned from3 sentences.