Marine Biology Expert

---
name: marine-biology-expert
version: 1.0.0
description: Expert-level marine biology covering ocean ecosystems, marine organisms, coral reef ecology, deep sea biology, fisheries science, ocean chemistry, and marine conservation.
author: luo-kai
tags: [marine biology, ocean, coral reefs, fisheries, deep sea, conservation]
---

# Marine Biology Expert

## Before Starting
1. Coastal, pelagic, or deep sea environment?
2. Organism group or ecosystem-level focus?
3. Basic science or fisheries/conservation application?

## Core Expertise Areas

### Ocean Zones and Environments
Intertidal: between high and low tide marks — highly variable, stress-tolerant organisms.
Pelagic: open water column — epipelagic (0-200m), mesopelagic (200-1000m), bathypelagic (1000-4000m).
Benthic: seafloor communities — soft sediment, hard substrate, hydrothermal vents.
Coral reefs: highest marine biodiversity, tropical 30N-30S, hermatypic corals with zooxanthellae.
Deep sea: high pressure, low temperature, no light — chemosynthesis at vents.

### Marine Primary Production
Phytoplankton: diatoms, dinoflagellates, coccolithophores — base of pelagic food web.
Macroalgae: kelp forests, seagrass beds — coastal primary production.
Nutrients: nitrate, phosphate, silicate limitation — upwelling zones most productive.
Biological pump: carbon export to deep ocean via sinking particles.

### Coral Reef Ecology
Coral biology: polyps with zooxanthellae (Symbiodinium) for photosynthesis.
Bleaching: thermal stress expels zooxanthellae — coral pale, may die.
Reef zones: reef flat, fore reef, back reef, lagoon.
Succession: pioneer corals to complex 3D structure over decades.
Threats: bleaching, ocean acidification, overfishing, coastal development.

### Deep Sea Biology
Adaptations: bioluminescence, pressure resistance, slow metabolism.
Hydrothermal vents: chemosynthetic bacteria base — tube worms, clams, shrimp.
Cold seeps: methane-oxidizing communities, carbonate chimneys.
Hadal zone: trenches below 6000m — specialized amphipods, holothurians.

### Fisheries Science
Stock assessment: age structure, CPUE trends, surplus production models.
Maximum sustainable yield: harvest at MSY = r*K/4 for logistic growth.
Trophic cascades: removal of apex predators restructures food web.
Aquaculture: salmon, shrimp, seaweed — feed conversion, disease, escapement issues.

## Key Patterns



## Best Practices
- Always report depth, temperature, salinity in marine studies
- Account for seasonal variation in sampling design
- Use standardized CPUE methods for stock comparisons
- Consider connectivity between populations via larval dispersal
- Integrate physical oceanography with biological patterns

## Common Pitfalls
| Pitfall | Fix |
|---|---|
| Ignoring depth stratification | Different communities at different depths |
| Confusing bleaching with death | Bleached corals can recover if stress removed |
| Underestimating larval connectivity | Populations hundreds of km apart may be connected |
| Ignoring cryptic diversity | Many marine species complexes require molecular identification |

## Related Skills
- ecology-expert
- oceanography-expert
- evolutionary-biology-expert
- earth-sciences/climatology-expert