Zebrafish Health and Welfare Glossary - Welfare Terms, Fins
FINS
| Parameter | Welfare Indicators | Sub Category | Synonyms | Definitions | Severity Score | Picture |
|---|---|---|---|---|---|---|
| General | Discoloration | Pale | Pale fins | Mild: Loss of fin colouration, fin colouration not expected for strain, no more than 20% of body or fins Moderate: Loss of fin colour fin colour not expected for strain, more than 20% of the body or fins Severe: Loss of fin colour, fin colour not expected for strain, more than 20% of fins. Additional signs of stress present such as increased operculum movement | ||
| Blackened | Blackened fins | Mild: Increased fin colouration, fin colouration not expected for strain, no more than 20% of body or fins Moderate: Increased fin colour fin colour not expected for strain, more than 20% of the body or fins Severe: Increased fin colour, fin colour not expected for strain, more than 20% of fins. Additional signs of stress present such as increased operculum movement | ||||
| Reddened | Reddened fins | Mild: Fins showing reddening but not affecting natural behaviour or development Moderate: Fins reddening, additional signs of stress present such as increased activity or lethargy Severe: Fins reddening affecting development and natural behaviours | ||||
| General | Deterioration | Splitting, fraying, deteriating appearance of fins | ||||
| General | Deformed | Abnormal shape, size, position or composition of fins | Mild: Fins deformed but not affecting natural behaviour or development Moderate: Fins deformed affecting development Severe: Fins deformed and affecting development and natural behaviours | |||
| General | Absent | Fins absent | Mild: Fins partially missing but not affecting natural behaviour Moderate: Whole fin completely missing, natural behaviour not affected Severe: Whole fin missing, unable to perform natural behaviours | |||
| General | Lameness | Temporary loss of mobility | Mild: Fins intermittently folded close to body (clamped) but not affecting natural behaviour Moderate: Fins continuously folded close to body (clamped) , natural behaviour not affected | |||
| General | Paralysis | Total Loss of ability to move a fin | Severe: Total loss of ability to move all fins (paralysis), unable to perform natural behaviours | |||
| General | Fin folded close to body | Clamped Fins | Fins clamped / not fanned out | Mild: Fins intermittently folded close to body (clamped) but not affecting natural behaviour Moderate: Fins continuously folded close to body (clamped) , natural behaviour not affected Severe: Total loss of ability to move all fins (paralysis), unable to perform natural behaviours | ||
| General | Mass | Swellings Raised Areas Lumps | Abnormal appearance of masses or all descriptions (hard, soft, different shapes etc.) | Mild: 1 mass under the fins which is not affecting natural behaviour Moderate: Multiple masses under fins which is not affecting natural behaviour Severe: Multiple massess under the fins and natural behaviour affected | ||
| General | White Mass | Swellings Raised Areas Lumps | White mass of cotton appearance | Mild: 1 mass under the fins which is not affecting natural behaviour Moderate: Multiple masses under fins which is not affecting natural behaviour Severe: Multiple massess under the fins and natural behaviour affected | ||
| General | White Raised Nodules | Swellings Raised Areas Lumps | White nodules covering the fins | Mild: 1 nodule under the fins which is not affecting natural behaviour Moderate: Multiple nodules under fins which is not affecting natural behaviour Severe: Multiple nodules under the fins and natural behaviour affected | ||
| General | Reddening at Base | Haemorrhaging | Reddening at base of fins | Mild: Fins showing reddening at base but not affecting natural behaviour or development Moderate: Fins reddening at base, additional signs of stress present such as increased activity or lethargy Severe: Fins reddening at base affecting development and natural behaviours | ||
| Partial | Lesion | short | Bite Bitten Injury | Partial absence of fin rays, partially regenerating, due to biting/aggression | Mild: *Fins partially missing but not affecting natural behaviour Moderate: Whole fin completely missing, natural behaviour not affected Severe: Whole fin completely missing unable to perform natural behaviours |   |
| Ray | Frayed Fins | Missing ray(s) | Bite Injury | Complete absence of fin rays from base; non-regenerating, due to biting/aggression | Mild: *Fins partially missing but not affecting natural behaviour Moderate: Whole fin completely missing, natural behaviour not affected Severe: Whole fin completely missing unable to perform |   |