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Marine Biology Course
More than 2 million students worldwide

Marine Biology Course

4.4

Dive deep into the science of the ocean with a comprehensive Marine Biology Course covering everything from seawater chemistry to coral reef conservation. Explore marine ecosystems, vertebrate physiology, deep-sea communities, and global fisheries management. Build the knowledge and practical skills that real marine biologists rely on every day.

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What you will learn:

This course covers the full scope of marine biology, starting with ocean zonation, seawater chemistry, and taxonomic classification. You will study marine microbiology, phytoplankton ecology, invertebrate zoology, and vertebrate adaptations in detail. Coastal ecosystems including coral reefs, mangroves, and salt marshes are examined alongside deep-sea and hydrothermal vent communities. You will also learn fisheries science, marine conservation policy, research methods, and molecular ecology tools. By the end, you will have the scientific foundation to understand, analyse, and contribute to the study and protection of marine environments.

How you study in practice Marine Biology Course

How you practise Marine Biology Course

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Course content

8 Chapters • 32 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Foundations of Marine Biology

  • Lesson 1 • The Marine Environment Overview

    Introduces ocean basins, major water masses, and salinity gradients. Provides the spatial framework needed for all subsequent ecological and biological topics.

  • Lesson 2 • Seawater Chemistry and Physics

    Covers dissolved gases, pH buffering, and nutrient cycling in seawater. Links abiotic chemistry to biological productivity throughout the course.

  • Lesson 3 • Classification of Marine Organisms

    Surveys taxonomic kingdoms represented in marine systems and introduces phylogenetic thinking. Builds the taxonomic literacy required for species identification chapters.

  • Lesson 4 • Marine Habitats and Biomes

    Defines pelagic, benthic, intertidal, and deep-sea biomes by their defining abiotic conditions. Prepares students to match organisms to habitats in later chapters.

Chapter 2See details

Marine Microbiology and Primary Producers

  • Lesson 1 • Measuring Primary Production

    Teaches oxygen evolution, carbon-14 uptake, and remote-sensing methods for quantifying marine productivity. Provides analytical tools applied in ecosystem chapters.

  • Lesson 2 • Marine Bacteria and Archaea

    Covers diversity, metabolic strategies, and ecological roles of prokaryotes in ocean biogeochemistry. Anchors understanding of nutrient cycling introduced in Chapter 1.

  • Lesson 3 • Phytoplankton Ecology

    Analyses diatom, dinoflagellate, and cyanobacterial communities and their bloom dynamics. Connects nutrient chemistry from Chapter 1 to biological productivity patterns.

  • Lesson 4 • Macroalgae and Seagrass Biology

    Examines morphology, reproduction, and ecological functions of kelp, seaweeds, and seagrasses. Establishes structural habitat concepts used in reef and coastal chapters.

Chapter 3See details

Marine Invertebrate Zoology

  • Lesson 1 • Mollusks and Annelids

    Examines bivalve, gastropod, cephalopod, and polychaete diversity, feeding, and locomotion. Builds comparative anatomy skills used in fisheries and ecology chapters.

  • Lesson 2 • Crustaceans and Echinoderms

    Analyses arthropod exoskeleton function, crustacean diversity, and echinoderm water-vascular systems. Connects to benthic community structure and trophic roles.

  • Lesson 3 • Zooplankton Communities

    Covers holoplankton and meroplankton composition, vertical migration, and trophic linkage to fish. Bridges invertebrate biology with pelagic food web dynamics.

  • Lesson 4 • Porifera and Cnidaria

    Covers sponge filter-feeding and cnidarian body plans, life cycles, and reef-building roles. Introduces symbiosis concepts central to coral reef chapters.

Chapter 4See details

Marine Vertebrate Biology

  • Lesson 1 • Fish Diversity and Physiology

    Covers cartilaginous and bony fish anatomy, osmoregulation, and sensory systems. Establishes vertebrate physiology concepts extended to mammals and reptiles.

  • Lesson 2 • Marine Mammal Adaptations

    Examines cetacean, pinniped, and sirenian morphology, thermoregulation, and diving physiology. Connects evolutionary transitions from terrestrial ancestors to fully aquatic life.

  • Lesson 3 • Marine Vertebrate Behaviour

    Covers migration, communication, social structure, and predator-prey interactions in marine vertebrates. Applies behavioural ecology principles to conservation and management contexts.

  • Lesson 4 • Marine Reptiles and Seabirds

    Analyses sea turtle navigation, marine iguana physiology, and seabird foraging adaptations. Illustrates convergent evolution of air-breathing vertebrates in marine habitats.

Chapter 5See details

Marine Ecology and Food Webs

  • Lesson 1 • Trophic Levels and Energy Flow

    Defines producer, consumer, and decomposer roles and quantifies energy transfer efficiency. Builds on primary production data from Chapter 2 to model ecosystem energetics.

  • Lesson 2 • Biogeochemical Cycles in the Ocean

    Traces carbon, nitrogen, phosphorus, and sulfur cycling through marine biological and physical processes. Links microbiology from Chapter 2 to global climate regulation.

  • Lesson 3 • Community Structure and Succession

    Examines species diversity indices, keystone species effects, and succession on hard substrates. Connects invertebrate and vertebrate biology to community-level patterns.

  • Lesson 4 • Population Dynamics in Marine Systems

    Covers recruitment, mortality, growth models, and density-dependent regulation in marine populations. Provides quantitative tools applied directly in fisheries management chapters.

Chapter 6See details

Coral Reef and Coastal Ecosystems

  • Lesson 1 • Salt Marshes and Seagrass Beds

    Covers halophyte adaptations, tidal creek dynamics, and seagrass bed faunal communities. Reinforces primary producer ecology from Chapter 2 in coastal contexts.

  • Lesson 2 • Mangrove Ecosystem Ecology

    Examines mangrove root adaptations, sediment dynamics, and nursery habitat functions. Connects coastal productivity to fisheries recruitment discussed in Chapter 5.

  • Lesson 3 • Coral Reef Biology and Structure

    Covers hermatypic coral physiology, reef zonation, and carbonate accretion processes. Integrates cnidarian biology from Chapter 3 with ecosystem-level reef dynamics.

  • Lesson 4 • Coral Bleaching and Disease

    Analyses thermal stress mechanisms, Symbiodinium expulsion, and major coral diseases. Applies food web and physiology knowledge to diagnose reef degradation.

Chapter 7See details

Deep-Sea and Open-Ocean Ecosystems

  • Lesson 1 • Bathypelagic and Abyssal Communities

    Examines food-fall ecology, sediment community structure, and pressure adaptations in the deep sea. Applies benthic habitat concepts from Chapter 1 to extreme environments.

  • Lesson 2 • Cold Seep and Polar Ecosystems

    Covers methane seep communities, sea ice biology, and polar food web structure under extreme cold. Broadens chemosynthesis and ice-associated ecology beyond vent systems.

  • Lesson 3 • Mesopelagic Zone Biology

    Covers twilight-zone organisms, bioluminescence, and diel vertical migration as a carbon transport mechanism. Extends food web concepts from Chapter 5 into the deep pelagic.

  • Lesson 4 • Hydrothermal Vent Ecosystems

    Analyses chemosynthetic primary production, vent fauna, and biogeographic patterns at mid-ocean ridges. Contrasts photosynthesis-based and chemosynthesis-based food webs.

Chapter 8See details

Marine Conservation and Management

  • Lesson 1 • Fisheries Science and Stock Assessment

    Covers maximum sustainable yield, stock assessment models, and bycatch quantification. Applies population dynamics from Chapter 5 to real fisheries management decisions.

  • Lesson 2 • Climate Change and Ocean Futures

    Covers ocean warming, acidification, deoxygenation, and sea-level rise impacts on marine biodiversity. Synthesises all prior chapters into a forward-looking conservation framework.

  • Lesson 3 • Marine Protected Areas

    Examines MPA design principles, no-take zone effectiveness, and spillover effects on adjacent fisheries. Integrates community ecology from Chapter 5 with conservation planning.

  • Lesson 4 • Pollution and Marine Debris

    Analyses plastic pollution pathways, chemical contaminant bioaccumulation, and oil spill impacts. Connects food web structure from Chapter 5 to toxicological risk assessment.

Certification

Your valid completion certificate

This course is for you:

  • Biology graduate: seeking to specialize in marine and aquatic ecosystems professionally.

  • Environmental consultant: expanding expertise to include coastal and ocean ecosystem assessments.

  • Wildlife enthusiast: wanting scientific depth behind a lifelong passion for ocean life.

  • Career changer: transitioning from land-based sciences into marine research or conservation.

  • Aquaculture professional: building ecological and regulatory knowledge to advance their practice.

  • Science educator: strengthening content knowledge to teach ocean biology more confidently.

What our students say

Your lessons are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of interest without needing to change platforms... I'm grateful for everything you do, I've already recommended you to other people...
Giulio Carlo
Giulio CarloDigital Marketing Student
I like how the lessons are straight to the point and how I can change chapters and skip content I don't need.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the way videos are presented and transcribed, which speeds up the process!
Luciana Alvarenga
Luciana AlvarengaNail Design Student
The platform is fast and simple to use. The diversity of content and complementary videos really help with learning.
André Felipe
André FelipePrompt Engineering Student

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