Delta Smelt

Because of its one-year life cycle and relatively low fecundity, it is very susceptible to changes in the environmental conditions of its native habitat.

The delta smelt is a pelagic (lives in the open water column away from the bottom) and euryhaline species (tolerant of a wide salinity range). It has been collected from estuarine waters with salinities up to 14 parts per thousand. 

Croaker

They are found worldwide, in both fresh and saltwater, and are typically benthic carnivores, feeding on invertebrates and smaller fish.

Croaker have an extended dorsal fin getting to practically to the tail, and an indent amidst the beams and spines of the dorsal, in spite of the fact that the several parts are in fact divide. The butt-centric fin ordinarily has several spines while the dorsal fins are profoundly scored or split. Most species have an adjusted or sharp caudal fin. The mouth is situated level and is ordinarily subpar.

Bigmouth Buffalo

The bigmouth buffalo are group spawners which produce 250,000 eggs/kg of adult weight, their eggs are approximately 1.5 mm in diameter. 

The bigmouth buffalo is a dull tanish olive shade with shadowy fins. Enjoy alternate suckers it has an extended dorsal fin, but unlike others it has an extensive sideways and terminal mouth. It is the most vast of the buffalo fish and scopes a length of something greater than 4 ft (1.2 m) and 65 lb (29 kg) in weight.

Hagfish

Hagfish have no true fins and have six or eight barbels around the mouth and a single nostril.

Hagfish are marine craniates of the class Agnatha or Myxini, moreover reputed to be Hyperotreti. Some specialists respect Myxini as not having a place with the subphylum Vertebrata. That is, they are the just living beasts that have a skull but not a vertebral section.

Blue-Eyed Pleco

Blue-eyed pleco have been kept as aquarium fish, and were decently mainstream the same time as the 1980's and early 1990's.

The blue-eyed pleco (Panaque cochliodon), is a herbivorous freshwater armored catfish from South America. It is nearly identified with the famous plecostomus catfish kept in a large number of aquaria as a pond greenery eater, but is quickly recognized by being dull grey to dark and having shining, turquoise coloured eyes. Love alternate species of the Panaque class, P. cochliodon sustains essential on submerged wood.