Table 2.

Current underwater dataset.

Dataset	Image			Data	Split		Challenges
	#Lab	Bac	#Cat.	#Tran	#Tes	#Tot	HLE	CC	LL	CMO
URPC2018	22,688	S	4	2901	800	3701	√	√	×	×
URPC2019	36,100	S	4	4757	1029	5786	√	√	×	×
URPC2020	46,287	S	4	6575	2400	8975	√	√	×	×
URPC2021	54,238	S	4	7478	1200	8678	√	√	×	×
UDD41	15,022	S	4	1827	400	2227	√	√	×	×
DUO42	74,515	S	4	6671	1111	7782	√	√	×	×
UODD43	19,212	S	4	2688	506	3194	√	√	×	×
RUOD	74,903	G	10	9800	4200	14,000	√	√	√	√