Table 5.

Detection recall of different models for various underwater targets with IoU thresholds of 0.5 and 0.7.

	IoU = 0.5				IoU = 0.7
	Holothurian	Echinus	Scallop	Starfish	Holothurian	Echinus	Scallop	Starfish
SSD	0.740	0.889	0.702	0.808	0.490	0.614	0.401	0.568
Yolo_v3	0.577	0.691	0.442	0.599	0.368	0.442	0.297	0.392
Faster RCNN	0.716	0. 859	0.621	0.774	0.564	0.681	0.483	0.619
Cascade RCNN	0.728	0.847	0.633	0.785	0.567	0.681	0.499	0.637
Proposed framework	0.759	0.900	0.735	0.827	0.604	0.722	0.588	0.690