5.1. Filterfeeding
 5.1.1. Feeding mechanisms and behaviour
    5.1.1.1. Pyrosomas
    5.1.1.2. Doliolid
    5.1.1.3. Salps
  5.1.2. Particle retention and natural diet
     5.1.2.1. Salps
    5.1.2.2. Doliolids
  5.1.3. Measurement of feeding
     5.1.3.1. Pyrosomas
     5.1.3.2. Doliolids
     5.1.3.3. Salps
  5.1.4. Comparative feeding rates
     5.1.4.1. Pyrosomas
     5.1.4.2. Doliolids 
     5.1.4.3. Salps
5.2. Assimilation and defaecation
  5.2.1. Doliolids
   5.2-2. Salps
5.3. Metabolism
   5.3.1. Pyrosomas
   5.3-2. Doliolids
   5.3.3. Salps
5.4. Growth
   5.4.1. Measurement of growth rates
   5.4.2. Comparative growth rates of salps and doliolids
5.5. Energetics
   5.5.1. Doliolids
   5.5.2. Salps