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Bands, Circuli, Hatch Marks, and Rings
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- Band A distinct group of dark rings created by thermal marking procedures. Multiple bands are separated from each other by a space that is significantly greater than those that occur between rings. Also see Thermal Mark.
- Circuli Concentric, continuous lines representative of incremental growth patterns present on scales and otoliths.
- Hatch Mark A circulus present on an otolith that is generated when fry emerge from their egg cases. The clarity of the mark varies within and among species.
- Ring An individual dark circulus generated by thermal marking procedures.
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