Fig. 1. Schematic diagram of polarized oceanic lidar system

Fig. 2. Sea trial route map

Fig. 3. [in Chinese]

Fig. 3. Signal difference between strongly scattered individual and strongly scattered population. (a) Few continuous profiles with peak bulge; (b) Exist strongly scattered individual; (c) Many continuous profiles with peak bulge; (d) Exist strongly scattered layer

Fig. 4. Peak contrast screening can effectively avoid the interference of strongly scattered layer

Fig. 5. Separate the jellyfish signal and the background water signal by linear fitting method

Fig. 6. Video monitor result and automatic detection result from lidar signal

Fig. 7. Distribution result of depolarization ratio of jellyfish

Fig. 8. Distribution result of signal contrast of jellyfish

Fig. 9. Histogram of jellyfish depth distribution and Gaussian fitting results