東北角的指鰭鼠銜魚 ( Dactylopus dactylopus )

體延長稍縱扁，頭縱扁，鰓孔位於體側稍上；前鰓蓋骨強棘其背緣具2-5個小倒棘，側線延伸至尾鰭鰭條末端，在枕骨區具一橫向側線將兩側側線相連；熊魚第一至第三背鰭棘延長，背鰭軟條全部分叉，腹鰭硬棘與第一鰭條與其餘鰭條分離，第一鰭條延長；保存標本體棕色，具白斑，第一背鰭深棕條紋及一黑斑臀鰭黑具藍斑，尾鰭1/3部份具黑斜紋，下半白色或淡藍斑
Identified by the finger-like separate first rays of the ventral fins, and distinguished from the similar D. kuiteri in usually having 8 divided rays in the second dorsal fin, the fin with a distinct horizontal pattern of lines in adults, and males have long filaments on the first dorsal fin (versus short or absent). Body moderately depressed. Preopercular spine with processes on both inner and outer sides. Pelvic spine and 1st pelvic ray fused into an elongate rod, separated from the other pelvic rays. Attains 10 cm SL.
Biology: Lives on sand-weed bottoms. Inhabits protected sand and mud flats and slopes at depths of 1 to 55 m; also include estuaries and deep water.