Algorithm 1. EKH algorithm

Begin

Step 1: Initialization. Initialize the Iteration counter I=1, the population P of NP krill, Vf, Dmax and Nmax.

Step 2: Fitness calculation. Calculate fitness for each krill according to its initial position.

Step 3: While I < Maximum Iteration do

Sort all the population according to their fitness.

for i=1:NP (all krill) do

Perform the following motion calculation.

Motion induced by other individuals

Foraging motion

Physical diffusion

Compute dxi/dt according to Equation (7).

Implement the crossover operator.

Updating the krill individual position in the search space.

Calculate fitness for each krill according to its new position.

end for i

I = I+1.

Step 4: end while

End.