Fish Resilience Is An Ethical Issue

Resilience is the capacity that fishes have to respond to challenges and return to normal functioning relatively quickly. This differs from adaptation, which involves permanent behavioral changes, and robustness, the ability to maintain productivity across environments. However, the authors of this paper argue that resilience is not merely a biological concept, but one that carries significant ethical dimensions that should be explicitly considered by those involved in fish farming, fish breeding, and fish welfare policy.

The authors focus on four key ethical dimensions of fish resilience. First, there’s a “rhetoric of optimization” that assumes that promoting resilience creates a win-win situation benefiting both fish welfare and production efficiency. This framing is inherently normative and may mask underlying human-centered priorities.

Second, enhancing resilience often requires trade-offs between individual and collective interests, or between animal welfare and environmental sustainability. For instance, making fishes more resilient to high stocking densities may improve production efficiency but limit species-specific behavior.

Third, the resilience concept connects to broader developments in animal ethics that go beyond traditional welfare considerations. Recently, animal ethics has increasingly emphasized animals’ agency — their ability to express preferences and exert control over their environment. This perspective may require rethinking how resilience is operationalized to better account for fish preferences rather than just their ability to withstand challenging conditions.

Finally, promoting resilience raises questions about the “manufacturability” of fishes and potential instrumentalization. When we physically adapt animals to better survive in difficult circumstances designed for human convenience, we risk crossing moral boundaries by treating fishes merely as production tools rather than sentient beings deserving ethical consideration.

The concept of fish resilience also highlights important questions about our relationship with aquatic ecosystems and our responsibilities toward them. As aquaculture continues to expand globally to meet protein demands, promoting resilience through breeding or environmental manipulation risks normalizing production systems that compromise fish welfare. While selective breeding for resilience traits may seem beneficial, it potentially shifts our moral attention away from addressing more fundamental issues within intensive aquaculture. Instead of asking how to make fishes better adapted to crowded, artificial conditions, we might ask whether such systems are ethically justified at all. This aligns with the precautionary principle in environmental ethics: rather than assuming we can successfully engineer our way out of welfare challenges, we should carefully evaluate whether our interventions may have unforeseen consequences for fish populations and ecosystems.

Resilience-focused approaches often emphasize physiological adaptations while overlooking cognitive and emotional aspects of fish well-being. Growing scientific evidence of fish sentience, complex social behaviors, and cognitive abilities suggests we should broaden our ethical framework beyond simple measures of survival and growth to consider the full range of fish experiences. This may require rethinking aquaculture designs to provide environmental enrichment, appropriate social groupings, and opportunities for fishes to express natural behaviors, rather than simply breeding fishes who can tolerate impoverished environments.

The authors conclude that those involved in aquaculture should address key questions when pursuing resilience:

1. What values are at stake?
2. Who benefits from increased resilience?
3. What needs to change to achieve resilience (the fishes or their environment)?
4. What moral costs are involved?
5. What alternatives exist?

By considering these ethical dimensions, aquaculture professionals can contribute to more responsible fish farming systems and better respect the interests of all involved, especially the fishes themselves.

Animal advocates should recognize that resilience isn’t inherently positive for fish welfare and should carefully evaluate whether efforts to enhance resilience truly benefit the fishes or primarily serve human production goals. The most ethical approach may involve adapting production systems to better accommodate the natural needs of fishes rather than making fishes more tolerant of suboptimal conditions.