Complex sentence: On the head, body, and tail, it has light, greyish skin, patterned with dark bands and blotches, although it contains noticeably lighter color patterns on its pectoral fins and pelvic fins.
Split into simpler sentences: On the head, body, and tail, it has light, greyish skin, patterned with dark bands and blotches. Although, it contains noticeably lighter color patterns on its pectoral fin and pelvic fins.