what kind of relationship does the second species has with humans?
It is not currently fished for human consumption and it is frequently displayed and bred at public aquariums.
Chain catshark
The chain catshark is not currently fished for human consumption.

The chain catshark has been described as "gorgeous", and this, combined with its small size, makes it a popular cold-water aquarium fish. It is frequently displayed and bred at public aquariums. 
what is psittacosaurus? It is a genus of extinct ceratopsian dinosaur from the Early Cretaceous what kind of flora existed during the said period? Flowering plants, Mesozoic gymnosperms, Gleicheniales what kind of animals were founds in the sea at that time? Rays, modern sharks and teleosts can the second animal survive in captivity? Yes, but most species are not suitable for home aquaria, and not every species sold by pet stores are appropriate do they exhibit properties of biofluoresence? Yes, but it is a characteristic of a few shark species, such as the swell shark and the chain catshark
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Chain catshark [SEP] Relationship with humans
The chain catshark is not currently fished for human consumption. The chain catshark has been described as "gorgeous", and this, combined with its small size, makes it a popular cold-water aquarium fish. It is frequently displayed and bred at public aquariums. Research in shark behavior, including reproduction, has been done in chain catsharks kept in public aquariums or laboratories.