A fin can be directional.Logical formLearned from2 sentences. A (flag scheme) may be painted on fins.Logical formLearned from2 sentences. (Endplate fins) can be vertical.Logical formLearned from2 sentences. A (tail unit) may carry (endplate fins).Logical formLearned from2 sentences. (Endplate fins) can be oval on a tailplane.Logical formLearned from2 sentences. A (tail fin) can be tall.Logical formLearned from2 sentences. Dorsal fins can be uninterrupted.Logical formLearned from2 sentences. Fins may be rounded.Logical formLearned from2 sentences. A lizardfish may have a dorsal fin.Logical formLearned from2 sentences. A coloration can be on pelvic fins.Logical formLearned from2 sentences. An (orange spot) can be on an anal fin.Logical formLearned from2 sentences. A bulb can be at an end of a fin.Logical formLearned from2 sentences. Pectoral fins can be yellowish.Logical formLearned from2 sentences. A dorsal fin may originate over an anal fin.Logical formLearned from2 sentences. An operator may transmit (control signals) to fins.Logical formLearned from2 sentences.