[3] This fish is generally yellow to orange in color with small dark spots and its tubercles are usually smaller and less pronounced than E. orbis, giving it a less spiny appearance.

[4] This genus is mainly characterized by their distribution in Northern regions of oceans, spiny external skeleton, and lack of a swim bladder.

Most adult E. Pacificus are yellow and orange toned with small brown to black dots scattered all over its body.

[8] There are observations of juvenile E. Pacificus have a darker head and body, and then slowly transition into their yellow and orange hues as they develop into adults.

This armor serves multiple purposes such as camouflage, environmental protection, and reducing drag from water currents.

Another morphological difference found in the Spotted Lumpsucker is the external skeleton between spawning and non-spawning male E. Pacificus.

[citation needed] Spotted Lumpsuckers live most of their life attached to rocks, aquatic vegetation, and any other stable substrates.

However, other Cyclopteridae species are typically found amongst rocks, stones, sea grass, algae growth and other solid substrate that they are able to stick onto.

[17][15][14] Because of their poor swimming ability, it is most likely that the Spotted Lumpsucker can inhabit in deeper ranges of the ocean, shallow waters, and intertidal zones.

However, due to their range, activities such as habitat loss/degradation, bycatch, and climate change can potentially threaten their populations.